Ais Wallenstein[]
Bell first met Ais when she saved him from a Minotaur. Because of that, Bell fell deeply in love with her and gained the skill, Liaris Freese. Ever since then, Bell and Ais have had a friendly relationship with Ais assisting Bell whenever he needed help, such as before the battle with the Minotaur and before the War Game with the Apollo Familia.
Bell and Ais continue to have a positive relationship as evidenced by the fact that she didn't hesitate to accept an invitation to dance, as well as consistently coming to his aid. During the Xenos arc, Ais and Bell fought, but were able to end things on a positive note after Bell requested that Ais train him again.
When Freya tried to seduce him disguised as Syr during their date, an image of Ais appeared in his mind, after which he pushed her back and rejected her.
When Ais, under Freya's charm, remembered her training and lap pillows with Bell, Bell was so happy that he cried and dropped to his knees, telling Ais that he was glad that he admired her and met her.
Hestia[]
Bell met Hestia after spending a week in Orario fruitlessly searching for a Familia to join. He accepted her offer to become her first member and is extremely grateful to her, considering her a part of his family. He works hard to help support her and bought her the hairbands she currently wears as a gift.
He cares for a great deal for Hestia and will do anything to protect her. He attempted to sacrifice himself by luring away a Silverback that was chasing her, he immediately tried to rush to her aid when he found out she was kidnapped by Mord, and was adamant on rescuing her when Ares had taken her. When Luan Espel was trying to rile him up by insulting his party, he was able to maintain his cool with the help of his friends; however, the moment he insulted Hestia, he immediately became angry and prepared to punch him before Welf intervened.
Though he highly respects her and even seeing her as a woman a few times, Bell held the belief that mortals shouldn't have romantic relationships with gods. When he expressed his thought to his Familia, he unintentionally hurt Hestia's feelings, causing her to run off. After being rescued from Ares and making up with Bell, Hestia realizes that part of his belief stems from his own experience with loneliness after his grandfather died and the fact that mortals will die and be reborn into a blank state while gods are left behind. After Hestia said that she will always be by his side and will find him even after he is reborn, he tearfully states he always wants to be with her, though he was not sure what to make of his own feelings.
Liliruca Arde[]
Bell first encountered Lili while she was trying to run from an adventurer she had stolen from. Not knowing what was going on, he protected her because "she was a girl", though she escaped when Ryuu appeared. Afterward, Bell was approached by a disguised Lili to be his supporter, to which he agreed. Bell was impressed with her skill and felt sorry for her after learning her familia was treating her poorly. He treated her kindly and gave her an equal share whenever they went to the Dungeon, something that stunned Lili. When Ged approached him with a plan to ambush and rob Lili, Bell angrily refused.
Though he trusted her, he felt that something was amiss. He was able to tell that she was lonely and he wanted to help her. Even when confronted by Hestia about her trustworthiness, Bell refused to abandon her. Though she stole his knife and left him to fend for himself against a pack of orcs, he came to rescue her from a horde of killer ants. When she asked why, he stated because she was Lili and that he didn't want her to disappear. Bell held her as she cried and the two soon reconciled their relationship with the approval of Hestia.
The two have a very friendly relationship, though Bell hasn't noticed her strong feelings for him. He relies on her skills as a supporter and, later on, as a strategist, even telling Haruhime about it. He views her as a little sister, but was prepared to fight Finn for her after thinking she had accepted his marriage proposal; however, he became flustered when she told him in a seductive voice that she was older.
Welf Crozzo[]
Bell became acquainted with Welf after using his former gear. Later, Bell made a contract with him to form a party. Bell views Welf as an older brother and appreciates his constant support. He follows his advice even when he doesn't fully understand the reason behind them and occasionally relies on his help.
Yamato Mikoto[]
Despite their first rough interaction, with the Takemikazuchi Familia pass parading his group, Bell never held a grudge against her. He valued her decision to convert to his Familia as a way of supporting him in the War Game against Apollo and both have kept a friendly relation ever since then.
Sanjouno Haruhime[]
Bell rescued Haruhime despite her thinking that, as a prostitute, she shouldn't be saved. Even though she refused his help several times he didn't desist and proved to her that a hero will save anyone, regardless of the circumstances. The two have a very friendly relationship with Bell trying to help Haruhime whenever he can and Haruhime, in turn, tries to do her best. She is in love with Bell, but he has yet to notice her feelings. Both also share a love for fairy tales and often discuss about them.
Ryuu Lion[]
Ryuu and Bell have a positive relationship and are good friends. After she invited him to her training sessions Bell has become a sort of apprentice of Ryuu, who has managed to endure her lessons despite her harsh training regimen. Bell holds her in high esteem as an adventurer and trusts her fighting skills.
After their journey through the 37th Floor they have deepened their bond and Bell came to know Ryuu better. Puzzled by her constant attempts to avoid him since their return, Bell later became happy to learn she wasn't mad at him, and both returned to their usual behavior. Since the War Game against Freya Bell has become aware of Ryuu's feelings after she confessed to him.
Eina Tulle[]
Eina has been Bell's dungeon adviser ever since he registered to become an adventurer. He often goes to her for advice and information about the dungeon, even in some cases going for help with matters unrelated to the dungeon, and the two share a sibling-like relationship, but he often ignores her advice on not going on adventures in the dungeon. He has been the only adventurer to endure her harsh teaching sessions, and he credits her lessons as a big part of how he has managed to survive in the dungeon thus far.
Bell views Eina as someone very trustworthy and cares a great deal about her, even at one point saying he loved her, though he didn't mean it as such. When she told him that she may have a stalker, Bell came up with every reason he could think of for Eina to accept him as her bodyguard. However, he refused to tell her about Wiene, as he didn't want to bring her into his mess.
After the Xenos incident, he started to go to Eina and ask for lessons instead and made fewer mistakes on tests than he had in the past. However, he has yet to notice Eina's growing romantic feelings for him.
Naaza Erisuis[]
Naaza helps run the potion shop that Bell frequents, and the two have a friendly relationship. Though she initially tricked him into buying lower quality products for higher prices, Bell felt sympathy for her after learning of the precarious situation her Familia was in and offered to help. His help allowed Naaza and Miach to come up with a new potion and avoid foreclosure. Since then, Bell holds no ill will against her and continues attending her store.
Freya[]
Due to Freya's initial habit of constantly staring at him, Bell developed an odd ability to sense people's stares. For his part, Bell never got to actually know her as a Goddess due to the very few interactions they had, though he was puzzled by her apparent interest in him.
As Syr, however, their relationship was completely different. Ever since their first interaction, she has made lunch for him almost every day and Bell gratefully accepts them. After Bell defeat a Silverback, she confessed to him that she fell in love with him after witnessing such feat, though Bell assumed she was just teasing him.
Afterward, they continued to have a good relation. She continued to support him and even motivated him after he gained Orario's resentment during the Xenos incident. Despite being conscious of her constantly toying with him, Bell still holds her as a dear friend and worried for her. Even when she took advantage and used him to relieve some of her work Bell didn't care, acknowledging that he felt indebted with her.
In the Goddess Festival, though forced by the Freya Familia to accept her invitation to a date, he also accepted it because he wanted to make her happy as a way to repay her constant support. Nonetheless, his love for her wasn't much more than that of a dear friend, ultimately rejecting her when she confessed to him.
Mord Latro[]
Bell first met Mord when the drunken adventurer offered him to join his party in exchange for sharing Lili, Syr, and Ryuu with him. Later, out of annoyance and anger, Mord kidnapped Hestia and forced Bell into a duel, in which he began to beat up the boy. Despite this, Bell does not hold a grudge against Mord. During the Black Goliath's appearance on the 18th floor, Bell rescued him from a monster.
With Mord gaining a sense of respect for Bell and openly supporting him, the two now seem to hold a friendly relation. Sometime after the War Game, Bell accepted Mord's invitation to a casino and resorted to him for help to aid Syr and Ryuu. After Freya charmed the entire city, Bell was excited when he encountered Mord and was taken aback by his sudden fear of him.
Aisha Belka[]
Bell first encountered Aisha in the Entertainment District after getting lost looking for Mikoto. He found her extremely attractive, but was unnerved when she showed interest in him. After finding out who he was, Aisha's interest grew much stronger. She was one of the many prostitutes to chase after him throughout the district.
After Bell met Haruhime and learned about Ishtar's plot to sacrifice her, Aisha intervened. When asked if he would try to save Haruhime, Bell was unable to answer, fearing retaliation from the Ishtar Familia, and was deeply affected when she mocked him for his indecision.
Once Bell and Mikoto resolved to save Haruhime and destroyed the Killing Stone necessary for the sacrifice, he again confronted Aisha. He stated his resolve to save the girl, much to Aisha's approval. Bell let Haruhime's level boost magic wear out before their duel, winning with a point-blank Firebolt.
Afterward, Bell promised Aisha that he would protect Haruhime and the two now have a friendly relationship. Bell holds faith in her strength and experience in the dungeon, having no objections when she has traveled with him. However, he still gets flustered around her because of her raw sex appeal, especially whenever she expresses her desire to sleep with him.
Miach[]
Bell knows Miach because both of them were from dirt-poor familias, as a result they are friendly with one another. Miach would sometimes give him potions for free, and Bell often goes to buy potions from his shop. Even after Miach's follower was caught tricking him out of money, Bell held no ill will towards him. When Bell asked him about relationships between mortals and Gods, Miach replied that he should not be afraid of a God's love, which helped Bell patch things up with Hestia.
Hermes[]
Bell and Hermes used to have a friendly relationship, with Bell holding a lot of trust in him. Hermes came to Bell's assistance when he was trapped in the dungeon, helped to give Bell an opportunity to dance with Ais, and gave him and Mikoto advice on how to free Haruhime from her life as a prostitute. Bell even noted that Hermes was the best oral tactician he had ever met.
However, their relationship became strained after the Xenos incident on the surface. Defending Wiene from other adventurers caused Bell's reputation plummet. Worrying for Bell and believing that coexisting with monsters is nonsense, Hermes set up a plan to trap the Xenos in a dead-end tunnel, with him alone knowing the way to the dungeon. In exchange for that information, he asked that some of the monsters rampage on the surface so that Bell could kill them and have his reputation restored.
Afterward, Hermes told Bell the reason for his actions. Bell could not decide if he hated the God because of his help in the past, but Bell could not forgive him either. Hermes took it in stride and said he would continue to meddle in his life, telling Bell that he was his fan.
Zeus[]
Bell's adopted grandfather and his only family while growing up. Zeus nurtured Bell's desire to one day travel to Orario and be a hero, as well as his desire to have a chance encounter with a girl. Bell loved Zeus dearly, and he was filled with a deep sense of loneliness upon hearing of his supposed death. Whenever Bell is unsure of himself or what to do, he thinks back to a piece of advice Zeus once told him or would imagine what he would say now if he were there, giving Bell the resolve and strength to move forward.
As of yet, Bell does not know that his grandfather is still alive, nor does he know that he is actually a God.
Wiene[]
Wiene is the first Xenos that Bell befriended and the one he is closest to. Upon their first encounter, Bell was stunned upon her more human appearance and the fact she wasn't showing behavior typical of a monster. He tried to pretend he didn't see her at first, but later rescued her when he saw that even other monsters attacked her. After discovering that she could speak and smile just like people, he decided to protect her.
Bell cares a great deal for Wiene, teaching her things about the surface world, treating her gently, and was able to use Argonaut while moving for the first time because she was in danger. When Bell and the rest of the Hestia Familia were tasked with bringing Wiene to the Xenos hidden village, he was saddened that he had to leave her behind, promising her that they would see each other again.
When Lyd told him that Wiene had been captured by hunters, he became determined to help find her, despite the Lizardman's objections. When her Vouivre's Tear was ripped out and she went on a rampage on the surface, Bell protected her from other adventurers, though it caused his reputation to plummet. When Wiene's magic stone was cracked, she told Bell that she was happy he was there to save her and that she loved him before turning to ash. Bell was heartbroken and was about to cry out in grief if not for her resurrection by Fels.
Even with his reputation in shambles, Bell still wanted to help Wiene and the other Xenos that were trapped on the surface make their way back to the dungeon. Bell even fought against Ais to protect her, desperately trying to convince the Sword Princess that Wiene was not like other monsters. Before parting ways, Bell promised her that he would make a world where they could live together, using a pinkie promise at Haruhime's suggestion.
Lyd[]
Bell first encountered Lyd when he and the Hestia Familia were taking Wiene to the Xenos's hidden village and were attacked by him and other monsters. After delivering an Argonaut-charged punch to the Lizardman's cheek, Bell was shocked when he suddenly started laughing and speaking fluently. After revealing the whole attack to be a test, Lyd gave Bell a nickname and offered him to shake hands. Though Bell was afraid of his appearance and felt like refusing, he remembered his encounter with Wiene and worked up the courage to do so.
Despite finding his appearance intimidating, Bell thought Lyd to be quite personable. He felt that his constant laughter helped to put him at ease, and he was able to recognize his facial expressions after some time. When it came time for the Hestia Familia to leave, Lyd told Bell to not hold back on killing monsters for the Xenos' sake, as he didn't want Bell to die. It was his words that helped Bell keep on doing so despite his hesitation.
After Wiene and Fear had been captured and the Xenos attacked Rivira, Lyd told Bell what had happened and expressed his rage. Though Bell was slightly scared of his monstrous demeanor, he sympathized with what he was feeling, noting that humans felt the same things that the Xenos were. Although supporting them only brought him troubles, Bell has continued to aid Lyd and the rest of the Xenos ever since they met.
Asterius[]
Asterius is the Xenos reincarnation of the Minotaur Bell defeated on the ninth floor. After losing to Asterius in a close to one-sided battle, Bell resolved to grow even stronger. He views Asterius as his rival and desires to be strong enough so that he can one day settle the score.
Bell's fight with Asterius also caused him to mature, as he became more calm and level-headed upon ascending to Level 4. He decided to study his magic and skills instead of just using them, trying to discover any new techniques that he could use against Asterius, like Argo Vesta.
Cassandra Ilion[]
Unlike most people, Bell does believe Cassandra's prophecies. After their expedition, Bell thanked her for the Goliath Muffler that she requested Welf to make, having found it quite useful in his fight against the Juggernaut and the time he passed in the 37th Floor. He values her as a friend and feels comfortable with her, asking her if she wanted to get a special dessert with him. Bell is oblivious to Cassandra's romantic feelings for him.