ST AR-15

ST AR-15, shortened AR-15, is a serious, strict and capable elite T-Doll and part of the AR Team. Despite her strictness toward AR Team members, AR-15 genuinely considers them her friends and revenge against the enemies who hurt them was a strong motivation for her. After escaping from Griffin for a time, she has acquired a reputation as a disobedient soldier only valuing her own freedom. She approaches battles with confidence, saying a soldier's courage honors its leaders.

In contrast to M4, who might choose to delay a mission to help allies in distress, AR-15 is far more objective-focused. She was especially annoyed by M4's indecisiveness, but eventually realized she only held back because the choices she had to make were much more difficult than those AR-15 had ever faced. After coming to this realization, she offered M4 her full support, saying she preferred that M4 chose to face danger with AR Team at her side rather than not trusting them to survive.