Oh god... XD I don't know, depends on which OCs I guess, but Susumu would be in heaven with all the girl OCs lmao. Michiko would be uncomfortable and Ryouta would be social butterfly and talk to each one of them. What about your's? Just like a regular, slice of life AU? Or like a Mafia or other specific one for example?
-throws the ladies at susumu- x^D Hmm well I got so many ocs so I also pick just three of my babes
Since mayuku is a good mood person she would be smiling all the time and will be friendly also if someone would act mean. (but depends on how mean she can get angry to haha xD) but usually she tries to be friend with everyone and invites new people to visit her for a piece of cake and a good tea In Nanikos case there will be two different ways. If she meets someone when shes not working she usualy blocks every kind of social contact. she just walks away or ignores people expect they ask for something she knows about she's kind of a walking lexicon and like to share her know ledge (since she's always travelling and never stays long on a place) While she's working (usually in casinos or bars) she's pretty friendly and asks strangers to have some drinking games(she usually wins xD) or a good round of poker. And Misa usually fakes a smile but doesn't enjoy that much meeting new people. It has to be kind of a feeling in her stomach that lets her open to strangers. But she stays nice to others but won't tell much about her self she's a closed book.
More like fantasy (example my oc mayuku got an AU self as "mayubunny" and is kind of in a relationship with my other oc Tohru (Girl) but in her normal not AU story shes totally straight xD) or slice of life.