Mike:He's stubborn and he has a hard time letting things go from the past. He'd do anything to prove anyone wrong and make a point with either his words or his actions even when people are telling him it's not worth the trouble. I can see him being very passive aggressive. Yk not wanting to have direct confrontation but instead pouting about it.
Benny:too trusting. I mean how easily did he let Scotty into his friend group? He didn't know the kid what if Scotty was an ass and just used Benny? He also has a tendency to look over peoples flaws and only see the good and more often than not people like that are the ones who get taken advantage of. He most likely bottles up his feelings making it hard for others to really know who he is.
Luis:it's the lack of loyalty for me. Like I'm sorry I just don't see him being in a non toxic relationship it's his flirty ways that get him in trouble like it or not luis is the type of guy to cheat. I know in our fanfics we all write about a girl who changes Luis and then he's not a flirt anymore but the fact of the matter is that Luis probably would continue being himself. Take him how he is or not at all.