|Voiced by||Yui Ogura|
|Debut Episode||Phantasmagoric Arc, Episode 6|
Alongside Supika, Sumako is one of the pair of girls that appeared on the trailer for the Japanese television block called "Ultra Super Anime Time". There, it featured the first three shows to premiere along with the block itself: Wooser's Hand-To-Mouth Life: Phantasmagoric Arc, Miss Monochrome Season 2 and Wakaba*Girl.
She has an outfit that resembles a bounty hunter from space (including her laser-like weapon) and wears goggles on her head, despite hers looking more like a bow. She also has her pink hair in pigtails and has a heart-shaped pendant on her neck