Oh, also, I'm not Charak but I think it'd be a good idea if some of the characters knew each-other in some way from before the RP starts. Not everyone, of course, but it'd be a good thing to have maybe an established group of "friends" as that makes it easier to form a party around. It also ties in with how DeSu actually does things, because almost every character has some knowledge of each-other in some way. To map it out:

DeSu1 has Yuzu knowing Gin, Gin knowing Haru, and Haru knowing Yuzu. Yuzu is connected to the MC and Atsuro, who are both connected to Naoya. Atsuro is also connected to Keisuke, and the both of them know Midori. Kaido and Mari know each-other.

DeSu2 has the MC and Daichi start off as friends while Io is their classmate. JP's, obviously, has all the staff knowing each-other (Yamato, Makoto, Otome, Fumi). Ronaldo also knows Yamato. Keita is associated with JP's before you meet him, as are Airi and Jungo. Then outliers are Joe, who mistakes the MC for a guy he saw around once, and Hinako who's completely detached from everyone. As an aside, Ronaldo is also sort of connected to Airi but neither of them know it.