Mizu Yamamoto

Mizu Irene Yamamoto is the demigoddess daughter of Neptune, the girlfriend of Frank Johnson (son of Hecate) and the half-sister of Percy Jackson. She and Percy together represent Poseidon's 2 realms: Water and Tectonics.

Powers

 * She can cause earthquakes
 * She can control lava
 * She can't get burned
 * She can breathe underwater
 * She can talk to horses
 * She can use minor geokinesis
 * She can create shockwaves from her hands