Operator 6O (pronounced Operator six-oh) is an android communication operator permanently stationed at the “Bunker”, a floating space station. As with other operators, her duties include sending directives to the YoRHa soldiers on the field as well as information analysis. Though her physical appearance is near identical to her fellow operators, she wears braids in her hair as a physical distinction.

Operator 6O, responsible for YoRHa No.2 Type B, is comparatively bright, friendly, and personal. It is not uncommon for 6O to contact 2B regarding matters unrelated to the mission in an informal manner; a clear contrast with the more stoic and impersonal 2B and fellow Operator 21O. Unable to leave the Bunker, she harbors a curiosity about what life is like on Earth.