Episode 12: Goodbye, My Wonderful Princes!
Ruby (ルビー, Rubī) is a crow and the familiar of Rill.
Ruby's appearance is typical of a crow, a bird with black feathers and a black beak. Her eyes are bright blue and she wears a red ribbon around her neck that is tied into a bow with a pendant on it.
Ruby is a rather loud, somewhat obnoxious character. She is usually seen perched on Rill's shoulder.