Koichi has an easy-going, mild-mannered personality. He is very generous and does not seem to expect anything from other people in return. He is somewhat unaware of social cues, accidentally gaining a reputation of being a "creepy guy", both among his peers at university, and as The Crawler. He also often accidentally insults people when trying to compliment them; he can be very awkward. As long as he is in some form of disguise or in a more or less deserted area, he sees no problem in using his quirk in public even though he is not a Pro Hero. He uses his Quirk to do good deeds for the public, such as picking up trash, returning lost items, giving directions, helping people get onto trains, being a cameraman, and recycling. He has a very heroic nature and cannot ignore people that need help.

He tends to be a rather calm person, sometimes accidentally making light of dangerous situations after they have passed. He is reasonable and is willing to have a dialogue with thugs and petty criminals. At the same time, he is quick to help when there is a real need for his abilities against Villains, showing that he can be attentive as well as calm. He dreams of being able to become a recognized hero and is shown to enjoy the vigilante work that he does. Despite his dreams of becoming a hero, Koichi doesn't see it as the "be all end all" of his life. His bravery and heroism extend to outright selflessness, especially in regard to how he treats his opponents. He will always try to talk things out before getting into a fight, and even then, will only ever fight in self-defense. He also does not tend to hold grudges.

Koichi is a 19-year old boy. I would like him to have a medium/kind of higher pitched voice, so not too deep or not too high.