Mirko was something of a social non-conformist who spoke her mind regardless of the situation and seemingly didn't care about the consequences. She also appreciated people who did the same, as she expressed admiration when Hawks controversially spoke his mind during the Japanese Hero Billboard Chart. Her real name is Rumi Usagiyama, her quirk is Rabbit, gave her the attributes of a rabbit including incredible leg strength and superhuman hearing. She was always eager to deliver punishment.