Rim (actually pronounced Rhyme) is a solid looking man, from his 5'10" frame (which, is not muscular, just hard and lean in a medium, almost sculpted build), to his visage.  One thing anyone notices about him straight away (or should do), is that he seems to have no hair: not on his head, no eyebrows, no facial hair at all except for eyelashes.

He wears a neutral expression on his face, neither harsh nor open, but there is an edge just underneath the surface.  That aside, he is rarely quick to anger and has a good temperament, which makes him relatively easy to get along with ... once you get to know him.  It is this side of himself he openly shows to people and, along with a good upbringing, is what keeps him grounded.  A penchant for helping people just happens to be a consequence of that.

Style-wise, Rim likes loose, comfortable clothing, which can also double as functional, however, he does like to wear hoodies (a lot).  This is complimented with a bandanna, which he wraps around to cover the lower half of his face.  Or, he'll wear lower face masks and goggles (the kind that are out now), which pretty much covers his entire face.  Something he is grateful for when he does his hero thing.

COSTUME
It is not actually a costume, as such.  Rather, it is a set of altered, bikers leathers (reinforced with a small amount of armour) and helmet (or mask/face coverings).