Chan and Solstice

Solstice, the sun demon, firstborn prince of demons, despite the fear associated with his name, is like a puppy in character!
Very affectionate with his partner and very naive, he is panromantic, polyromantic, and asexual! Chan, the moon demon, future-sitter, and second demon prince, made a pact with Solstice to share his partner. He is easily embarrassed, a bit tsundere, and often shy, but can be outgoing and mischievous when he wants to be. He is biromantic, gender romantic, and asexual.
They are brothers.

Solstice is a Sun Demon, primarily colored gray, white, and black. He has gray skin and scales, and a white scar on his right eye, rendering him half-blind. One of his horns is white, the other black, as is his large tail. His wings are white. He wears mostly red, gray, and orange clothing, and his black boots have two white straps down the middle. His other, undamaged eye is yellow, with a black slit-like pupil. His hair is brownish-yellow, with white ombre and highlights. His voice is not quite what you'd expect from such an infamous demon prince: high-pitched and slightly raspy, almost cartoonish.
Chan is a Moon Demon, primarily colored blue, red, and gray. He has grayish-blue skin/scales with a black birthmark on his left eye, red eyes with blue slit-like pupils, one of his horns is the same color as his scales/skin, and the other is black as the night sky, his tail is grayish-dark blue with red spots, and his wings are the same jet black as his left horn. He wears primarily blue, black, and red clothing, with reddish-brown boots and barely noticeable yellow socks. His hair is blue, like his tail, with a gradient from light blue to black. Chan's voice is raspy, simultaneously low and high.