Sekido has red eyes, he is the manifestation of anger. Overprotective. Curved horns and black hair. Easily angered.

Karaku is easy-going and relaxed, he has green eyes, curved horns, and black hair. He's flirty. 

Aizetsu is the manifestation of sorrow. He's usually dejected and describes things in depressing ways. Blue eyes.

Urogi is the manifestation of joy. He's happy all the time. Energetic. He has yellow eyes and brown wings. Flies you around. Sadistic. Has talons.