Riku Sena

Younger of the two Sena Sisters. Dumb Muscle: Subverted. While Ichika is quick to dismiss both sisters as this, its clear that Riku is easily "the smart one" of the duo. She's incredibly street savvy, is highly adaptable in a brawl, and favors overwhelming her opponents with technical combination of strikes versus Riko's tactic of flailing her arms around like a cavewoman. Sir Swears-a-Lot: Female example, but she has a sailor mouth for sure. Red Oni, Blue Oni: The Blue to Riko's Red. Smart Jerk and Nice Moron: Has this dynamic with her dumber, surprisingly amiable older sister.