Ghost-Half Personification (♂)
(In other words, this is Youmu's ghost half, but as a person instead of as a hitodama, and as a boy; to contrast with Youmu-kun's various artist self-insert pics. "擬人化" is "personification"; "半霊ちゃん" ("hanrei", literally "half-ghost") is the Japanese fan name for the ghost half. Western fans typically use the name "Myon" instead (referencing a nonsense phrase Youmu herself says in the games).)