Ichika Oda, the younger sister of Nobunaga Oda, shares a home with their parents. She frequently worries about her brother, who entangles himself in complicated situations involving individuals connected to the historical Oda Nobunaga. Even as exasperation grows over Nobunaga's tendency to indulge in unrealistic fantasies, Ichika consistently stands by him, providing support and assistance. Ikoma Kitsuno reveals her as the reincarnation of Lady Oichi, the historically recognized younger sister of the original Oda Nobunaga known for her wisdom. This spiritual connection places Ichika within the broader narrative involving reincarnations and time travelers linked to the Oda lineage.