Himiko Toga

Himiko Toga is a major antagonist in Avengers Endgame who first appeared in the anime/manga My Hero Academia (Boku no Hero). She consumes people's blood and uses it to take their form.

Appearance
Toga has blonde hair tied in two frizzy buns on the side of her head. She has yellow eyes and fangs for canine teeth. She wears a scout-like uniform most of the time, and usually wears a black mask, a scarf with white teeth on it, and a machine with 6 syringe-like mechanisms to drain peoples' blood.

Story
In Infinity War, she takes on a minor role as a background villain, but attempts to creepily flirt with Deku while Catti is attempting to remove the Mind Stone from Aqua's staff. She is then killed by Thanos in the Spirit Realm, after Kai told Thanos he must kill Toga in order to get the Soul Stone. In Endgame she takes on a more important role, and after drinking large amounts of Aqua's blood in the Memory Chamber, assumes her form and comes to the present. She also gets some more extra creepy flirting in with Deku in the final battle. In the end, her insanity really shows, as she playfully laughs and rolls in the dust of other league members as she disintegrates.