Kass is a Kremling child and a playable character in Donkey Kong Barrel Blast. She was made to rival Dixie Kong, and as such she has the same racing stats as her. She is also the first known Kremling to be explicitly female. She also has hair, a trait most Kremlings lack (she shares this trait with Kalypso and Kasplat).
She returns in Donkey Kong Knockout as a rival for Dixie Kong again, during their inital fight in Adventure mode Kass starts their fight by pulling Dixie's hair in an attempt to tease her and torment her. She holds a strong rivalry towards Dixie Kong
She is in a relationship with Kip as shown when the interupt Diddy Kong and Dixie Kong's date. They announce themselves as a couple, well more like she announces them as a couple, he just shrugs and agrees.