The story's main character. His recent discovery in the Borderland and the thing he has to do onward is not to be taken lightly. But he has his reason for doing all of it and getting to know many people strengthen his resolve.
Middle-aged man in appearance. Has interest in mythical creatures and also the reason why Hiroshi has to remind him to counterbalance it with something...
One of the three Overseers that Hiroshi initially has to help as a penalty for losing the spar after getting out of the No Disturb World list. Somehow has a great impression of Hiroshi despite the lack of interaction
Has the appearance of a young boy. One of three Overseers Hiroshi has to assist when his world is contaminated with Outer Demon's wisp aura.