Rouka Numachi

Rouka Numachi is the former basketball rival and supposed arch-nemesis of Suruga Kanbaru. Though she once shared an affinity for basketball akin to Suruga, albeit as a defensive player, she would go on to sustain a leg injury that would end her endeavor in sports. The two had a falling out in middle school due to Rouka's injuries causing a rift between the two.

Rouka is characterized by the concept of "schadenfreude"; in which she derives pleasure from the misfortune of others. A self-proclaimed collector misfortunes, she enjoys listening to people's problems whilst offering empty promises of helping them out. Turning this form of counseling into a non-profit service, Rouka began to operate under the alias called "Lord Devil"; in which she promises her customers that she can solve anyone's problems with absolute certainty.