Yin (Lilo & Stitch)

Experiment 501, nicknamed "Yin", is a cephalopoidic extraterrestrial that loves to drench people and cause havoc. Much like any of Dr. Jumba Jookiba's 500 series, Yin causes elemental disruptions; her specialty is water, able to suck in water through her tentacles from any source, and blasting large torrents at her aggressors. Jumba's data states if she comes into physical contact with her opposite a catastrophic explosion will occur, in the end Yin and Yang created a small island using their abilities.

Trivia

 * Her name if derived from the concept of yin and yang.