Family[]
Takumi Aldini[]
Takumi is Isami's twin older brother as well as his partner and sometimes rival in the kitchen. Despite being a younger twin brother, Isami is more level-headed than Takumi. He laughs at Takumi when he gets embarrassed. He sometimes enjoys teasing Takumi whenever they have play games. However, the two share a close bond, and Isami is supportive and openly admires his older brother's cooking skills.
Isami's Father[]
Isami's father is the head chef of the Trattoria Aldini. Isami got scolded by him for revising one of Takumi's dishes. As years went by as Isami had improved, his father had him and Takumi recommended to enroll Tōtsuki Culinary Academy to have their skills polished.
Isami's Uncle[]
Isami's uncle is the owner of the Trattoria Aldini who also had him and Takumi recommended to enroll Tōtsuki Culinary Academy to have their skills polished.
Tōtsuki Culinary Academy: Allies and Rivals[]
Sōma Yukihira[]
Isami seems to be friendly with Sōma.
Megumi Tadokoro[]
Isami is shown to be on good terms with Megumi.