Anime character with a snake on his head and a snake on his shoulder

anime character with a snake on his head and a snake on his shoulder, omen from score, handsome guy in the art of the demon killer, portrait of Professor Sinister, sage (score ), son of Sparda, inspired by Kano Hogai, Illustration by Shigenori Soejima, portrait of a samurai of cyberpunk, Rossdros and jazz