Sister

Sister (누나) is a Biklonaut positioned in space and is the youngest member of Bamsongi's team. She is partnered with the sysop Bebe and is the current pilot of the Scorpio Clone.

Like the rest of her team, Sister is an amnesiac and doesn't remember her past, with the only thing hinting at it being a wristband labelled "sister", which is where she derived her current name. She has seemingly been a Biklonaut for much longer than the Oh siblings, which is apparent by her skill in controlling the slow-moving Scorpio clone. She is also a quick thinker and can improvise on the fly, while also being a kindhearted older sister-like figure to the less experienced Oh siblings (fittingly).

Arsenal
Sister's suit and Action Bike are based on the Scorpio clone. Her suit has the secondary color black, though it appears that her Action Bike is purple, for some reason. She has access to the Chaos Pistol.