To put it simply, Daichiro is an asshole. He's very straight forward and sassy, and no one really likes him. Unlike the rest of the cast, he's not someone in rehabilitation, but he chose to work as their guide on old earth. He claims it's because he wants to see people suffer but its clear there's another reason he's hiding. He's rarely phased by anything, except for when you comment on how feminine he looks, then he gets angry. 

For voice direction, I'm pretty set on wanting him to have a Brooklyn accent, however I want it to be something he clearly exaggerates since he's a bit of a Americaboo and disregards the fact that he is fully Japanese.