Lyla is an angel trainee who serves under Nanael as an assistant. She originated from the terran world before the Head Angel discovered her and brought her to the celestial world. Under Nanael's supervision, she earned the nickname "Divine Punishment Enforcer" and received the task of cleansing chaos on the terran world through a form of divine punishment involving holy milk. Lyla appears in the OVA series "Vanquished Queens," which depicts events involving characters absent during the "Queen's Blade: Rebellion" storyline, showing what happened to them after "Queen's Blade: Utsukushiki Toushitachi."