Cestria

Cestria is an Aquitian that appeared as a love interest for Billy Cranston. She was first encountered when Billy began to suffer from accelerated aging, during which time Billy travelled to Aquitar to receive treatment. When he was cured, he chose to remain on Aquitar with Cestria rather than return home to Earth. This pairing is somewhat humorous given the fact that Billy once suffered from ichthyophobia.

Some believe that she may be the sister of the Cestro. Others disagree, as Karim Prince (the actor who plays Cestro) is African-American and the actress that plays Cestria is white. It remains unknown whether Aquitian genetics would thus render a brother-sister relationship impossible or unlikely, or whether it would have no effect at all.

In Power Rangers: SPD, an Aquitian that may be a child of Billy by Cestria is in the training area.