Amika Kurebayashi, a sharp-witted high school student with jet-black hair, forms a mischievous duo with Sakurako Urushima. Their antics frequently spark romantic tensions, most notably fueling the simmering love triangle between Takeru, Mari, and Hikari through calculated provocations. Their dynamic crackles with playful tension, epitomized by a near-kiss during a beach outing when a collision sends them tumbling toward each other—a charged moment underscoring their ambiguous bond. This chemistry takes center stage in an alternate-universe OVA spin-off, where interdimensional displacement crystallizes their interactions into mutual romantic acknowledgment.

Jealousy drives many of their schemes, particularly their begrudging admiration of Hikari and Akari’s physiques. This envy colors their worldview, shaping their endorsement of pseudoscientific theories about the sisters’ origins as both mockery and coping mechanism. Their shared reverence for "Ryo-sama" anchors their comedic antics, yet the evolving intimacy between them adds unexpected depth to their roles as chaos agents and plot catalysts.

Their backgrounds remain shrouded in mystery, their narratives propelled not by personal histories but by the evolving dance of alliances and rivalries that shape the story’s romantic core.