Robin

Robin has had a weak constitution since birth.  Though gentle and generally kind in his outward approach to others, Robin actually can hold a bit of a grudge.  He does this often with people he thinks either view him with pity, coddle him, or underestimate him, all of which he doesn't like.  In this regard he can actually be quite vindictive, and he has a competitive streak most people don't see. 

Due to his status as royalty, Robin has been taught self defense but has relatively low stamina.  His skill level at direct combat such as hand to hand is mediocre at best.  He prefers stealth-based combat, and his preferred weapon are long needles (thrown or stabbed in peoples' backs).