Funako Chiba is one of fifteen female students stranded on a deserted Pacific island with a male classmate, Kazuma Shiraishi. She has red hair, yellow eyes, and blood type AB. Her physical measurements are 88 - 58 - 87.

Funako maintains a rough and aggressive demeanor, particularly toward men, which is most evident in her hostile interactions with Kazuma Shiraishi. She carries a wooden sword, using it to threaten or discipline Kazuma when he irritates her. In contrast to this hostility toward males, she exhibits strong affection for animals, displaying fondness for any cute creatures encountered on the island. This extends to protective instincts and care for others, excluding Kazuma. Despite her typically combative attitude, she can display moments of kindness.

Her behavior includes a relationship with Nanashi, a wolf deity also stranded on the island. Funako shares bathing sessions and engages in sexual activity with Nanashi. These intimate interactions occur despite her stated lack of lesbian orientation.