Miyu Shiratori (白鳥 美由 Shiratori Miyu) is the main antagonist of AIKa Zero.
Miyu looks similar to Karen Minamino, but Miyu has silver hair that has bangs hanging on the left side and red eyes.
Miyu uses students in her school to take over...something. From a wealthy family, she became very popular at her high school and became the student council president, which she renamed White Knights. She has a very close relationship with E.T.A.I., maybe even lovers. When Aika leaves her to stop the rocket, Neena Hagen, who was spying on her, knocks her out and retrieves her together with E.T.A.I., so she and her brother can examine them both.
Miyu was the first girl probed by the aliens, while she was exploring the caves underneath her school. Despite the obvious danger, her curiosity got the best of her and she entered the dark area alone after being led there by the tendrils. In the caves she found the giant spaceship buried below the ground, but while she was watching it in amazement a tendril sneaked up on her from behind and probed her through the butt. She then screamed and collapsed with a moan, before being taken unconscious into the alien ship.
Aika Sumeragi leaves Miyu unattended after taking care of E.T.A.I., maybe because she no longer saw her as a threat. She seems to prove her right by not attempting to do anything, not even escaping and just staying in the Church, contemplating E.T.A.I.'s unconscious body and lamenting her fate. There she is found by Neena Hagen, who slowly approaches her. Miyu barely reacts to Neena's presence, probably thinking she's just a regular student and represents no threat, until her assumption is suddenly proven wrong when she suddenly pulls out a gun on her. Startled, Miyu then seems to attempt to stand up and maybe negotiate with the girl, but her efforts are useless and she is mercilessly put down with a shot as she lets out a loud moan. The impact causes her to arch her back, making her butt stick out and sending her skirt flying upwards. She then remains motionless as her skirt falls back down into position, still unable to cover the whole of her ass, and finally crumbles down over E.T.A.I.'s body, skirt totally hiked up and ass fully exposed. Neena then retrieves her and E.T.A.I.'s unconscious bodies and takes them to her brother.
When Miyu got her powers from the aliens, she obtained the ability to create constructs that probe the body and mind of girls with weak wills. She has combat skills above the other White Knights, but has no particularly strong resilience, as she is still weak to normal means of submission, being defeated fairly easily by Aika in their second battle. Still, she seems to be very quick and skilled as she was able to easily overwhelm and defeat Risako with sheer speed.
Miyu has an close relationship with E.T.A.I. and she was introduced to her after her encounter with the aliens.
Miyu does not seem to have any close relationship with Kana or Rin prior to the proving and posterior induction into the White Knights. However, being the first girls chosen for the group, they seem to immediately become her lieutenants. This does not stop Miyu from using them as cannon fodder to entertain Aika Sumeragi while her and E.T.A.I. leave to get the spaceship working. Miyu is not even moved while contemplating both girl's fate at Aika's hands from a monitor.
- The name Miyu means "beautiful" (美) or "fruit, good result, truth" (実) (mi) and "excellence, superiority, gentleness" (優), "tie, bind" (結) or "evening" (夕) (yu).
- Miyu's surname Shiratori means "white" (白) (shira) and "bird" (鳥) (tori).
- Miyu is the only White Knight who is never knocked out by Aika Sumeragi. She gets beaten by her, but remains conscious and Aika leaves her alone in a hurry to stop the spaceship's launch. However, she is taken care of later by Neena Hagen.
- She and E.T.A.I are the only White Knights who are never shown carrying someone or getting carried themselves