[DonRotolo]

This could be my team.

For the Mentor thing, Jared's advice is spot-on. Talk to the mentor privately, perhaps you and another mentor if you feel threatened or uneasy, and describe a SPECIFIC incident and HOW it made YOU FEEL. Then ask if they might rein it in for the future.

For the student thing, it gets more difficult, particularly if mentors are unwilling or unable to explain to the student what the team expectations are. But again, Jared's suggestions are excellent - I think I'm going to follow them myself when "our student" returns in the fall.