Keikazu's older brother, but not by blood.

Rist found Keikazu when they were both Pikachu's, and Rist barely managed to bring back Kei' to life with his own electric charge.
Since then, Keikazu has looked up to Rist, and tried his hardest to be as good as his older brother. But Rist evolved long before Kei'.

• Rist is a closet gay. To hide suspicion, he tends to manwhore around to a lot of female pokemon. He is still single though.