Emma, a blonde middle school transfer student, speaks in an archaic, samurai-inspired dialect that initially confuses her classmates. Her fervent dedication to gaming spans multiple consoles, some capable of projecting in-game elements into reality—an obsession that triggers sleep paralysis when tangled controller wires bind her limbs overnight. Her parents regularly confiscate her devices to curb excessive play, spurring her to hunt for hidden consoles. Though peers initially suspect supernatural possession due to her eccentricities, they eventually attribute her quirks to passionate otaku tendencies. She engages in playful rituals, like greeting others with sequentially numbered "Nice to meet you" repetitions. Her character embodies gaming-culture aesthetics, with no expanded backstory beyond her documented traits.