Siper is examinee #80 in the 287th Hunter Exam. She always wears sunglasses in the manga and uses a sniper rifle. In Phase Four of the exam, her designated target is Gittarackur. Siper tries to kill him by sniping at him from a distance while he is facing his own target, Gozu. However, Gozu accidentally takes the shot in the back and is mortally wounded. Annoyed by her interference, Gittarackur kills her and takes her badge.