See post #5963750.
Flayon is a short boy with red hair with black streaks, orange eyes, and fangs. His default outfit consists of a black skin tight bodysuit that covers his navel, a black choker, a red cropped jacket, black kneehighs held up by sock garters, and red shoes. He also has two shield pieces and drones as accessories, befitting his lore as the Tempus Guild's pilot.
Lore-wise, he is a mecha pilot. His profile and debut initially set him up as a kusogaki, though this eventually subsided and he's more or less a little brother figure to the rest of the guild. Despite his young appearance, he claims to be over 18,000 years old, though this is actually the number of times he's died and his true age remains unknown. He enjoys visual novels and fighting games, and he also has a slight perverted streak, listing "plot heavy" visual novels as one of his likes and letting slip that he learned to do a feminine voice by watching hentai.