Well, someone reviewed for my story Tokens, but I can't figure out how to reply --_-- So I'll post here and hope he/she sees it.

Yes, it is pretty hard to keep track of the characters. Even I keep wanting to type Havoc instead of Chaos every once in a while. So here's a little guide.

Chaos - Chaos' inspiration is sight. As well as having the enhanced sense, he can read, control or manipulate someone's mind by looking in their eyes. In this way, he can tell the brain to shut down vital functions and kill that way. Signature: Emotionless, poses as the leader figure.
Havoc - Havoc's inspiration is taste. His body produces a toxic poison (toxic to anyone except his brothers) that can be transferred into someone's blood stream through a bite. Signature: Has a bad attitude the majority of the time, softens up when around Solace, and has fangs.
Vex - Vex's inspiration is hearing. He can produce sounds at many different high and low frequencies of sound that can break items as well as stop hearts and burst eardrums. Signature: Normally always listening to music.
Blight - Blight's inspiration is smell. His body, much like Havoc's, produces a poision that leaves his body with every breathe. When inhaled, the poison will first make a person sick, then start shutting down vital organs. Signature: He wear's a mask.
Solace - Solace's inspiration is touch. When his skin comes in contact with an object or person, he can simply destroy it. Through the contact, he is able to . . . degrade? dismantle? the object or person. Put simply, it disintegrates. Signature: Cute and cuddly, like a toddler stuck in a fifteen-year-old's body.

Hope it helps!