Indigo

Indigo's twin brother, Rain, was exalted to the Tidelord during a time when the clan was suffering from an outbreak of disease. Both she and Rain had fallen ill, and although it seemed likely Indigo would pull through, Rain wouldn't have lasted another week. Mizu believed that her son's best chance of survival lay with their deity. The Tidelord would heal Rain, and in return Rain would serve him forever.
Today, even after so many years, Indigo has never forgotten her brother and best friend growing up. Whenever a new exalt prepares to leave the clan for the Tidelord, she always sends a message along with them for Rain. It doesn't matter that she'll never hear back. She just wants her brother to know that she's okay, and to never forget her.