Ivanna S. Pankin

Denise Grimes (born 1969 ), known as Ivanna S. Pankin, is a roller derby skater and organizer.

Grimes grew up in Phoenix, Arizona. She spent a large amount of her youth roller skating at a local rink, and watched RollerGames. She spent her twenties around the punk rock scene, playing in bands, and writing fanzines. Inspired by an old poster for the Unholy Rollers movie, she founded Arizona Roller Derby (AZRD) in mid-2003.

Although Grimes was not initially aware of the existence of other roller derby leagues, a neighbor introduced her to a friend who was involved in the Texas Rollergirls, In 2016, Sin City Skates was sold to a new owner, so the pair can focus on running RollerCon.