Onii-chan wa Oshimai! - Oyama Mihari (Phat Company)Oyama Mihari · Phat Company

Phat Company presents Oyama Mihari from the anime and manga series Onii-chan wa Oshimai!, also known as Onimai: I'm Now Your Sister! Mihari is the brilliant younger sister and scientist whose experimental drug transforms her older brother Mahiro into a girl, setting the series' premise in motion. The series blends comedy and slice-of-life elements as Mahiro adjusts to life as a middle school girl, with Mihari serving as both the catalyst for the transformation and a guiding presence throughout her brother's new experiences. Their sibling dynamic drives much of the series' humor and heart, as Mihari balances her scientific curiosity with genuine care for her brother's wellbeing. Phat Company has also produced figures of Mahiro from the same series, and this Mihari figure was showcased at Smile Fest 2026 alongside her brother's figure, highlighting the pairing of these two central characters.