Oyama Mihari

Oyama Mihari (also known as Oyama Sho) is from the manga and anime 'Don't Be an Onii-chan!' is the younger sister of the protagonist Mahiro Oyama, voiced by Kaori Ishihara. She is 17 years old, has blood type AB, is 154cm tall, skipped grades to attend Yotsuba University, and is a genius girl skilled in biopharmaceutical research. She excelled in both academics and athletics during middle school, with outstanding track and field results. She is a heavy brother complex and desperately craves her sister. To change her reclusive NEET brother, she secretly developed a gender-conforming potion for Shinjin to drink and turn him into a young girl. She then takes care of him throughout and guides him to adapt to girlish life. Her appearance is soft and cute with black-and-gray twin tails and a white lab coat. Her inner thoughts are bold and unrestrained. She enjoys collecting collectibles of her brother's cute moments and is not good at makeup. Although she seems to care for her brother, she secretly wants a sister of her own. Her name sounds like "surveillance," which matches her habit of constantly watching over her brother. She is lively and straightforward , Occasionally panicked and shy when plans went wrong.