[DampRobot]

It sounds like you've handled a very difficult situation with remarkable grace and maturity. If it means anything to you, I'm really sorry that you had to go through this, especially during a period as stressful as build season.

That said, I'd recommend you talk to your head mentor. It sounds like the mentor in question is newer to the team, and I'm sure that your head mentor would be more than able to talk to him about the role of a mentor. I'd also add that although talking to him personally is commendable, it may not be the most effective course of action. For some people, being told off by a student that they are supposed to be leading, especially in front of other mentors, may be extremely embarrassing. Perhaps a talk from a fellow mentor would be a more effective approach.

Good luck.