Jamil Viper/Relationships

MC
In Episode 4, he views them as someone useful for his plans and hypnotizes them to stay in Scarabia against their will. Although the Prefect was suspicious over how they couldn't say no to Jamil, they still initially viewed him as a good person who simply wanted the best for his dorm. Once Jamil's true colors were revealed, however, the Prefect's opinion of him changed, and they even went as far as reprimanding Kalim when the latter tried to deny Jamil's betrayal and pin the blame on himself.

Despite all that happened, Jamil and the Prefect are shown to be in amicable terms once they meet again in Episode 5. The Prefect even expressed worry when Azul and Jamil interacted with one another, as they believed Jamil still resented Azul for what happened at Scarabia. Jamil later admitted that he would still continue to make a name for himself, regardless of what the social hierarchy entails, and he mentioned the Prefect as one of the people he wanted to prove himself to.

In the events, as well as some of Jamil's voice lines, Jamil is depicted to be appreciative and fond of the Prefect. It is heavily implied in his Episode Lv Up voice line that he considers them as a friend, and he expresses worry over not being interesting enough to hang out with. In the Fairy Gala event, he complimented the Prefect's Gala Couture clothes, while he watched out for them in the Al'Ab Nariya event, when the Prefect's phone almost got stolen.

Ace Trappola
Jamil and Ace are in the Basketball Club together, with Ace usually acting as the stereotypical, troublesome underclassman, much to the former's exasperation. Jamil can read easily into Ace's schemes, and if it doesn't particularly affect him, he usually just leaves him be—one example of this being that time Ace tried to use Floyd's physical talents to his advantage during basketball tryouts, which later backfired horribly because of Floyd's mood swings. Jamil knew of this possible repercussion, but didn't warn Ace beforehand.

In Episode 5, Ace recalls Jamil teaching Floyd how to breakdance before, and asks Jamil for dancing tutelage. Jamil accepts after Kalim insists that they teach Ace and co., but he mentions that he himself doesn't particularly mind, as this would also help him practice.

Deuce Spade
Jamil and Deuce don't interact as much as he and Ace do, but Deuce often approaches Jamil for advice, as depicted in Episode 5, in the manga anthology, and their shared Masterchef event. Deuce sees Jamil as a reliable upperclassman and looks up to him for his skill, while Jamil—although rarely—is shown to appreciate Deuce's insight, such as when the freshman gave him an idea on what makes a dish appetizing in Jamil's Apprentice Chef personal story.

Jack Howl
Jamil and Jack have only interacted once (in Endless Halloween), but they have surely known of each other prior to that. Jamil was one of Savanaclaw's victims over the course of Episode 2, though his injury wasn't as severe as Trey's. He and Jack were also both part of the Monster Team during Beansfest, though their respective stories for the event never aligned. In the Vargas Camp event, they also attended the same training camp together, though they didn't interact because they were in different clubs.

In Endless Halloween, they meet when Jamil and Silver encountered a possessed Jack. Jack was taken over by a female ghost who considered the two sophomores as thugs, thus making Jack flail his arms around in defense. Jamil lampshaded how this made him difficult to fight, as Jack is incredibly buff. When Jack recovered from his possession, he didn't believe Jamil when he informed the freshman about how he behaved. Jamil also tried to interrogate Jack about what he remembered before he was kidnapped, but they didn't end up getting any helpful information.

In that same event, Jamil and Jack both got super into Silver's reiteration of his past, and Jamil scolded Jack for scaring them over nothing when the latter's tail movements made the nearby bushes rustle.

Epel Felmier
Jamil and Epel first met in Episode 5 during the VDC auditions, and they eventually became fellow members of NRC's team for said competition. Jamil knew of Epel's struggles with adjusting to the choreography (and to an extension, Pomefiore), as well as his animosity towards Vil, but he chose to stand at the sidelines and even stopped Kalim when he tried to interfere with Epel and Vil's fight. Despite this, Jamil is implied to have felt happy for Epel when the latter finally enjoyed dancing, and in Jamil's Endless Halloween personal story, he teaches Epel how to waltz.

Sebek Zigvolt
Jamil and Sebek share an interesting dynamic, as they both parallelize each other, especially in terms of how they view servitude. Jamil condemns how he is bound to the Asims as a servant, while Sebek is hopelessly devoted to Malleus, even outright crying because he was jealous of Jamil and Kalim's master-servant relationship, lamenting over how he wasn't born before Malleus and thus couldn't take care of him since birth.

In Jamil's Ceremonial Robes personal story, Sebek once got lost in Scarabia during the night after the Entrance Ceremony. Jamil was strict with him as he was wary over Sebek being a potential assassin, and while he was understandably aggravated by this at first, Sebek eventually understood that Jamil was merely doing his job as Kalim's attendant. He admitted that he wished to be as diligent as Jamil was in his job, and from then on accepted Jamil's criticism and advice, making it apparent that Jamil is one of the few humans Sebek genuinely admires and respects. Sebek was also overjoyed when Jamil accepted to listen to him ramble about Malleus—in exchange for his full cooperation for event preparations in Sebek's Ceremonial Robes vignette.

In Jamil's Union Birthday SSR story, Sebek gave him a traveler's essay collection that he personally customized with tips and fun facts. Jamil appreciated this a lot because he'd always been interested in travelling all around once he was finally set free.

Ruggie Bucchi

 * Jamil relates to Ruggie's struggles as they're both often burdened with the task of looking after their troublesome dorm heads.

Azul Ashengrotto

 * Classmates (2-C)
 * Jamil finds Azul to be quite troublesome as he often sees through him and urges him to show his hidden talents.

Floyd Leech

 * In the basketball club together. Jamil once taught Floyd how to spin on his head.

Kalim Al-Asim

 * They've known each other since they were little. For generations, the Viper family has served the Asim family. Due to this, Jamil had to hold back in everything so he didn't beat Kalim, which caused him to harbor negative emotions towards Kalim for many years. After Jamil's overblot, Kalim told Jamil to stop that relationship and start over as friends, which Jamil immediately rejected. Jamil now serves Kalim willingly till Kalim sets him free. Despite Jamil's open hatred towards Kalim, Kalim still cares for Jamil regardless and still sees him as a friend, even after all of the ordeal they went through.