Natsuki Takamizawa

Natsuki is one of Tatsuya's closest friends and is also one of his classmates. She works with Tatsuya at her father's restaurant, Trattoria Samon, which also happens to be next door to Tatsuya's house. She often gets angry at Tatsuya or her brother when they tease her. She is best known as the Carbon Master, due to her inability to cook and all her attempts ending up as blackened messes (including salad).