Openly gay, rather angry
Martin is a good-looking young man who is openly gay in a society that is often openly homophobic. He doesn’t particularly like Barbara Streisand or musicals (not that he hates them), nor does he conform to any of the other stereotypes associated with being gay, not that this stops others using these as barbs against him.
Since, of course, more than barbs tend to be thrown his way, Martin has learnt to defend himself quite capably with his fists. He was made to join the Breakfast Club after one too many of these fights, a fact that royally pisses him off. None of his attackers have been sent to counselling, only he has “aggression issues”.