[bam-bam]

That just sounds like an angry stew of.... something angry waiting to boil over. I would be very against it.

First of all, it's a wonderful thing to see that you have this concern and it seems like you want to put a stop to this quickly. Good on you for not letting this pass by.

Joining something completely new can be a scary thing, especially at a rather volatile time in life. I've experienced it before, and it can be difficult. The one thing that helped me through it a quite a bit was that someone always reached out for me and tried to include me with the group. You may not end up being the closest of friends, but at the very least your member can feel accepted by the team, even it is just for a bit.

As for your other member, I really can't give any advice. People are just... people, and a lot of times you'll just have to take the bad with the good. Hopefully, your member will mellow out a little more as the season progresses. If things get much more serious, then let your mentors know. Us users are not psychologists, counselors, nor mentors/students on the team on top of not knowing your situation at all.