Arisaka Takuto

He has steadily built up his track record and trust since he was a first grader and became the head of a vigilante. He has deep attention to his surroundings, and can advance into trouble because of this knowledge.

He wants the power of the gem to save his younger sister who died due to his own ability. He volunteered to be a vigilante because he thought it would be more convenient to take the gem that way. He's been prepared to sacrifice everything for that purpose, but also has conflict of not wanting to hurt the friends he's made.

"I will steal the gem. However, I won't hurt my friends."

Spoiler

Ability: Forced Rewind -Time Return-

Has the ability to automatically rewind time to 3 days before after 4 weeks have passed. He wasn't able to control it initially, but was able to with a certain item.