Yunai was born four years after the Neo Akatsuki War, she was raised by her mother and older brother. She joined the academy along with her best friends, Sora Yajuu and Obito Ryou. Some point during her academy days she learned the truth about her father from Hira Uchiha, despite her father's demises she knew that his will was passed down to him and she would pass it down to future generations. She later became a member of Team Haibun along with Obito and Sora.
Yunai is a fair skin girl with blue eyes and general body structure, she wears a plain, white, lace dress and light blue sandals.
Yuina, begin raised by just her mother believes that she is a strong women and shares her mother's personality. She, also like her father, is a strong believer in the Will of Black Flames and wishes to be an inspiring role model for the next generation. She fro an unkonw reason shares a sibling rivalry with her brother, this is possibly due to him being a prodigy in the village.
Being a member of the Susumu Clan, Yuina is a highly capable ninja, considered by Sen himself to be the strongest member of her generation.