Illumi

Illumi is a mysterious woman who is after quite literal rifts in time and seems to be an allied of Devon, but her goals appears to merely run alongside his, without truly being part of his goals.

She appears to live in a small temple in the sky, where she's keeping watch of what happens down below. She also appears to be a fortune teller, as she can inform Devon of what his next course of action should be. However, at times, she says that his future is shrouded in mystery, meaning there's nothing left for him to do.

Trivia

 * Her age is unknown.
 * In the ruined future, the walking husks says "She abandoned them". Given the state of the Sky Temple, it is highly likely they're referring to Illumi but it is unknown what exactly happened there.
 * The only two other people with yellow eyes appears to have them due to a pact with Kin'Aurea.
 * Whether she has them due to being born with them or from a pact is unknown.