Seiren

This character is a powerful Cardian tasked with extracting human energy to resurrect the Makaiju, with a primary focus on Rei. Possessing the appearance of a pink-haired mermaid, she wields her long hair as a weapon, capable of draining enemies of their life force, which manifests as a blue transformation or golden scales. Her attacks involve water streams, effectively neutralizing some opponents but proving ineffective against specific powers like Fire Soul Bird.