Yuarisla acts as the antagonist in the second OVA episode. She is a water goddess dwelling within a dungeon, demanding human sacrifices from surrounding settlements. Her typical practice is to take the lives of those sacrificed, though she sometimes engages in prolonged interactions with certain captives before killing them.

Physically, she manifests as a nude woman with blue skin, red eyes, and a slim, curvaceous figure. Her most distinctive trait is her long hair resembling flowing water, which cascades over much of her body. She wears only an ornate decorative collar.

Her personality embodies malevolence and haughtiness befitting a dungeon overlord. She exhibits sadistic tendencies, deriving particular pleasure from sexual encounters with young women before their deaths.

Her abilities exploit her liquid nature, including liquefaction, shapeshifting, and compressing to enter confined spaces. In combat, her lower body transforms into a giant crab form, unleashing wide-ranging attacks. She also commands gargoyle minions during battles.

Her narrative centers on receiving a sacrifice sold to her. Instead of immediate execution, she subjects this captive to prolonged torment. This delay allows the captive's companions to intervene. They confront and ultimately defeat Yuarisla after a battle involving her crab form and minions.