Yuuri

Age: Unknown

Gender: male, female, and pan - served as inspiration for Yuri's design, which is intended to only be "slightly boyish"

Origin: Unknown

Species: Human

Height: Presumably under 5'2 (158 cm)

Occupation: Unknown

The protagonist, suffering from amnesia, gets caught up in a debate to find the Gnosia who has infiltrated the interstellar ship D.Q.O.

Yuuri is an original character who was created to represent the "player" character in the adaptation.

[Spoiler] In episode 10, Yuuri suddenly becomes a girl, possibly hinting at the ability to choose your gender in the source material. [/Spoiler]

(Source: Official Site, translated)