Nana Hoshi is a first-year university student and a main character in the anime Food for the Soul. She initially appears as a stylishly dressed girl with long, dyed blonde hair and green eyes, though her appearance was once plainer before she changed it. Nana is introduced after the Food Culture Research Club has already formed, joining as its fifth member. She had previously known Tsutsuji Higa from high school. Nana is extremely shy around strangers, to the point that it prevented her from recruiting other students to start a Puzzle Club, which she had originally hoped to establish. Her intense shyness at first misleads others into perceiving her as intimidating, but once she feels comfortable with people she considers friends, she reveals a bright, bubbly, and energetic personality. She has a strong affinity for puzzles, including Rubik's cubes and logic puzzles, and keeps a pet chameleon named Pochi at home.

Nana's initial motivation for joining the Food Culture Research Club was not a deep interest in food but rather a desire to be part of any club after her own attempt failed. As she spends time with the group, she becomes an active participant in their cooking and eating activities, helping with preparations and showing enthusiasm during their shared meals. Her role in the story is that of a fellow club member who, like the protagonist Mako, struggles with social anxiety, but her growth involves learning to trust and open up to the rest of the group. Her key relationship is with Tsutsuji, who acts as a bridge between Nana and the other members, often helping her feel more at ease. Over the course of the series, Nana develops a closer friendship with Mako, Shinon, and Kurea, and she becomes more comfortable interacting with strangers, though she remains shy. Her notable abilities are limited to her puzzle-solving skills and her gradual ability to express her cheerful side when among friends.