Along with Roidmude 092, Roidmude 028 was assigned to the Freeze Roidmude after Freeze requested the services of a couple of Reaper Units from Medic Roidmude. The two assumed the guises of attendants to Freeze's human form Soichi Makage. 028 first encountered Shinnosuke Tomari as he was walking down the other side of the corridor carrying a box of lunches. 028 told him to move out of the way so they can pass to which he, as yet unaware that Makage is head of the Roidmude infiltration, obliges.
When Shinnosuke deduced "Makage"'s true identity and confronted him. The two Reapers assumed their true forms and attacked Shinnosuke. Having come without Mr. Belt, Shinnosuke was unable to do much until Chase, the former Reaper of the Roidmudes, showed up to deal with his successors. Transforming into Kamen Rider Chaser and taking the fight outside, Chase destroyed both Reapers with the Across Breaker.