Headcanons ahead!

• (from the fanfic) This Itsuki comes from a timeline where Sensui isn't dead, but trapped inside the Mafuukan barrier. Yet he still bears the same wound caused by Kuwabara's Jigentō over the right side of his face, as he had to guide Team Urameshi + Mitarai in Makai where Sensui and Koenma were.
• Itsuki joined Team Korei stipulating a fixed term contract with Koashura, lying on his records of having previous experiences with other gods (namely, Koenma) in hope to talk with Koenma once again.
• Itsuki was a politics major in the past, but doesn't have a degree. He attended Gandara's university.

(currently a wip since mod is thinking about making a separate blog for him)