Mika Nogizaka, Haruka’s junior high sophomore sister, balances stability with a mischievous edge, frequently teasing Haruka and Yuuto Ayase while playfully addressing the latter as “Onii-san.” Her confident exterior masks a shared vulnerability with Haruka: both falter under exposure to explicit content, triggering flustered reactions.

Mika fills her days practicing violin, mastering squash, tending to wild pigs, and discreetly observing her sister’s interactions. A two-time student council presidential candidate at her all-girls school, she’s dubbed “Moonlight Strawberry” by peers, mirroring Haruka’s idol-like stature. Though briefly acknowledging romantic feelings for Yuuto, she selflessly prioritizes her sister’s happiness. Her ghost phobia contrasts her bold public persona.

Initially protective, Mika questions Yuuto’s compatibility with Haruka, citing their family’s elite status. Yet witnessing his unwavering devotion softens her stance, leading her to champion their bond—even aiding Yuuto in thwarting a forced marriage scheme by confronting their parents. This shift underscores her loyalty and capacity to reassess biases.

Chestnut-brown twintails frame Mika’s blue eyes and petite 147 cm frame. She favors dresses accented with stockings, floral accessories, or cozy hoodies. As a Nogizaka heiress, she navigates familial tensions stemming from her father’s disdain for Haruka’s otaku passions. Her proactive role in crises highlights a willingness to defy expectations for loved ones’ sake.

Mika evolves from a playful instigator to a pivotal ally, blending sharp wit with emotional depth. Her journey reflects a balance of lighthearted teasing and quiet maturity, cementing her as both comic relief and a linchpin in resolving pivotal conflicts through loyalty and resilience.