Appears in the story "The Case of Toshiko and Naomi". Toshiko obtains the notebook containing the mermaid's flesh myth from Yuuko, another student who turns into a mermaid in front of Toshiko's very eyes. Toshiko doesn't like Naomi, her rival for Kimura's affection, and decides to also hunt down a mermaid when Naomi announces that she will. No relation between her and Nanae Suzuki.