Itsuki Torataka works as a police officer in the Public Security Bureau, monitoring Scards within Akatsuki special ward. He is a Scard himself, marked by the Kyuki tattoo that enables aerial movement. Trained from youth as a Scard handler, he exhibits advanced physical prowess, expertise in tattoo manipulation, and combat skills. This background fostered his emotionally reserved disposition and preference for minimal social interference, leading to frequent irritation with colleague Kouga Tatsuma’s informal and overly familiar behavior.

Physically, he stands 174 cm tall with silver hair and pink eyes, aged 17. His birthday is February 29. The name Itsuki, rendered in katakana (イツキ), holds no inherent meaning, though the kanji (樹) translates to "tree." His surname Torataka combines "tiger" (虎) and characters connoting reverence or nobility (尊). His star sign is Pisces.