Rui has short, brown hair and an average build. On College grounds, he usually wears the school's uniform, consisting of a short-sleeved white shirt, black pants and black tie. During College exercises and Carceri exploration, Rui wears a dark form-fitting combat suit.
The Mirage Paladin
The Broken Holy Spear
Rui and Yuno are at the Sixth Cluster of New Itogami Island, investigating reports of missing workers.
- Yuno Amase: It is heavily implied that Rui and Yuno are dating. Kojou and Shizuri spotted the two flirting with each other at the Post Exchange. At the OS Base, a hot spring in the Carceri, Rui openly complimented Yuno when she showed off her swimsuit.
- Kasugaya Shizuri Castiella: Rui tends to refer to Shizuri as Squad Leader.
- Kojou Akatsuki:
He is a skilled sniper and uses Spell Fragmentation rounds which can release ritual spells that can bind powerful Shinigami and Golems in place.
He is also armed with a pair of heavy pistols and a carbine which he can load with rubber bullets or enhanced bullets for combat against Demons