From The Dan VS Wiki
My aura is way off

Thunderbird is a black afro hippie, second in command to The Hippie Leader, and a member of the Hippies of the S.S. Friendship. He appears in The Beach

He is the epitome of the problems that flow through the group, more concerned about discussion circles and 'aura levels' then actually taking a stance. (The Progressive Pacifism to contrast with Dan's violent Mixed-Anarchism) Despite this, he seems to have a slight cynical undertone when it comes to drum circles and especially after Dan betrays them, signalling that he may be more self aware and dissatisfied with the other hippies then he lets on.