This is basically like with Verno.
Easy to gang up on someone new in a Old small friend group. Plus he is even from Taiwan.
Him being quiet because the other 4 have been together longer. (for verno it was against FNS, ETHAN and SOM.)
He is just shy like in the interviews. I hope other team will able to utilize him and make him comfortable like with Verno in MIBR.
He might not be talking because he already agree with others idea and don't want to argue. He felt unfair for not being given a chance.