Dyris is a beautiful mermaid who sought to put the world underwater. She only remained beautiful when she was in the water. On land, she returned back into her true form. She only appears in the Xiaolin Showdown episode, "Scream of the Siren".
She hadsgolden blonde hair, green eyes, and a curvaceous figure in her mermaid form.
On land, she is a gigantic gray amphibian-like creature with a greenish-brownish belly. Her mass was exponentially larger than while in the water.
- Superhuman Strength: While she was in her Monster Form, she had superhuman strength, able to lift and throw Omi with ease.
- Underwater Breathing: As she was a mermaid she could breathe underwater.
- Manipulating Skills: Dyris manipulated the monks through flirtation to further her goal. In order to do this, she would use the Black Beetle and Tunnel Armadillo to dig a hole to the center of the earth.
- She is voiced by Grey DeLisle who also played Kimiko Tohomiko.