Claire was the mother of Daniel and wife of Hiro.
After joining Max and Hiro, she became the team's medical expert and started learning how to fight from her training with The Gem Warriors.
She eventually left Daniel with The Gems at the age of 10. Daniel in his later years speculated it was because he reminded her too much of his father.
She was turned into the Ersatz of Water by Father, renewing her youth but deleting her memories and changing her personality.
It was later revealed she had contracted a deadly disease from prolonged states of fusion with Hiro and she did not want her son to see her slowly wither away.