Tsumugi Shiraui

Tsumugi Shiraui was a Gauna-Human hybrid, a Chimera, created by Ochiai and Kunato Developments for fighting against the Gauna. Though secretly she was made from the placenta of Gauna 491 in the form of Shizuka Hoshijiro by impregnating 'her' with a human embryo. At the end of last Gauna War, she married Nagate Tanikaze and settled in Lem VII, where they had a daughter named Nodoka. Befitting her hybrid nature, she looks like a humanoid Gauna. She is about as big as a Guardian and looks like a woman in a gown of some sort. Though her face is mostly covered by a layer of placenta resembling a mask, she has teeth and eyes beneath it, with one eye being covered by the placenta. Despite this, however, she is capable of showing facial emotions, noted by Nagate, much to her embarrassment. When not in battle, she utilizes a probe of herself connected by a long tentacle of Placenta to her main body to move around Sidonia through the pipes. This version of herself has a single eye in the middle with two tentacles or more if necessary, that act as 'arms'. Tsumugi was created to be a bio-weapon of mass destruction by Ochiai (possessing the body of Norio Kunato) using the resources of Kunato Industries. By combining Gauna 491 with a human embryo, Ochiai perfected the Gauna-human experiments that he failed nearly 100 years ago. The end-product was a chimera with enough destructive power to destroy a Mass Union Ship, but one that serves the interests of Sidonia. Despite being a stunningly powerful monster, Tsumugi has the heart of a young girl. She's playful and kind-hearted, fascinated even by the most mundane things, and enjoys exploring the world of Sidonia. It is hinted that her personality is actually the remnants of Hoshijiro's own personality through her mother. Tsumugi even sounds like Hoshijiro when she talks, although it is not confirmed whether she is in some way a reincarnation of Hoshijiro. Even though Tsumugi is aware that she's part Gauna, she chooses to defend Sidonia for her father and for the friends she made in the Sidonia. After surviving an attack by a swarm of Gauna, she swore that she wouldn't allow such things to happen to any of her comrades, solidifying her resolve to defeat them all. When not in combat she can be rather playful, especially with Nagate, Izana and Yuhata, whom she spends the most time with. Due to her being about the size of a Guardian, she often interacts with people by extending her probe worm-like body through the pipes of Sidonia to have a life beyond the hangar. Her probe body can mimic human bodies, analyze the composition of objects, and can even probe the minds of people when they're unconscious. During the brief sortie with Tsuruuchi, she knew of his personality and played with him. After a comment on her and Nagate's relationship, she accepted the offer to fly with him at the end of the work shift. She proceeded to take off at a blinding speed through the Construction site with him in tow, taking an incredibly convoluted flight path. Afterwards, she was noted to grin at the shell-shocked Tsuruuchi, who could not keep up with the rapid maneuvers or acceleration.