Ramshackle[]
MC[]
Deuce first meets MC when, together with Ace, they're searching for Grim. After getting into trouble and solving the issue along with Ace and Grim, Deuce and MC become good friends. Along with Ace, he was also worried for them, when notified about their situation with Scarabia. And went back to school as soon as possible, despite the holiday not being over yet, just so he can check on them.
In A Wish Upon A Star event, he expressed his wish to see all his friends see him become a magic police officer he dreamed to be in the future. And mentioned how he also want the MC to be there when it happened. Despite, them probably not being there anymore when such time comes.
They're in the same class and often hang out with each other. There is a line in which Deuce claims that he and Mc are close friends, although when asked to try to explain the slang he uses he ends up giving up.
Grim[]
Deuce regards Grim as a troublemaker, but a friend nonetheless.
Deuce scolded Grim in Book 5 when the latter referred to Malleus in an overly casual manner.
Heartslabyul[]
Riddle Rosehearts[]
Deuce took Ace's side in the conflict between him and Riddle during the events of Book 1, resulting in tension between the two. However, after Riddle's overblot and apology, they seem to have a good relationship.
Ace Trappola[]
They're from the same hometown, but didn't meet each other prior to their enrollment at Night Raven College. Initially, Ace and Deuce didn't get along with each other. Deuce often found Ace too annoying and loud and wished he would take the situations occurring around them more seriously. But after getting into trouble together, MC suggested the two of them should work together to solve an issue they were facing.
Although reluctantly, they agreed into it, and it worked out well. Afterwards, Deuce and Ace started to get along with each other better, and form a sense of solidarity - although Deuce still scolds Ace at occasions for misbehaving.
Aside from being classmates and seatmates, they often hang out together outside classes. This closeness of theirs, along with Grim and MC, has been noticed by various characters. Once, for example, we see Grim steal an omelet from Deuce that Ace offers to replace, since he has already stolen part of the Prefect’s Salisbury steak.
Savanaclaw[]
Jack Howl[]
They're both in the Track and Field Club and are on friendly terms.
Pomefiore[]
Epel Felmier[]
Deuce initially thought Epel was frail and aloof, but came to realize that the two have much more in common than at first glance. He is empathetic towards Epel's struggles to achieve his goals, as he himself feels like he's barely making progress towards being an honor student no matter how hard he tries.[1] The two seem to have similar hobbies and fashion sensibilities as well. They struck up a conversation that being able to embroider a powerful animal like a dragon or tiger onto the PE uniforms would make them look much cooler. They also share an interest in magical vechiles.[2]
Diasomnia[]
Malleus Draconia[]
Deuce fears but also respects Malleus as one of the five most powerful living mages of the world. Despite his fear, however, he was ready to fight Malleus when he misunderstood the situation as to why Malleus called him out during class. Deuce was willing to help Malleus with his problem regarding an electronic toy, despite feeling unsure if he could fix it. Aside from not wanting to bring shame to Heartslabyul's name, Deuce's reason was also to get on Malleus's good side.[3]
Night Raven College Staff[]
Ashton Vargas[]
Vargas leads the club Deuce is part of, Track and Field. Deuce has shown some degree of sympathy for Vargas, liking his passionate personality and his training regimen. But he doesn't appreciate Vargas very much when he starts talking about muscles.[4]
