Scrapped Princess (2003)

S1E8 Nocturne of Bonds and Prayers

Zeferis reveals that Sim is actually Cz, a Peacemaker and a foe of their team. Despite the revelation, Pacifica is unwilling to take her life, prompting Sim to flee. Pacifica pursues her and discovers her alongside Steyr. In a twist, Steyr transforms Sim back into Cz, but Shannon and Zeferis intervene, compelling them to withdraw.