Chitose Ikeda appears as a supporting character across official "YuruYuri" media, including the main series, "MiniYuri," "Reset!," and "Tensei Shitara Akari dake Slime datta ken." She serves on the Nanamori Middle School student council, consistently depicted alongside Ayano Sugiura. Chitose is the older twin sister of Chizuru Ikeda, sharing a close bond that includes everyday activities like shared baths and sleeping in the same bed.

Her appearance features wavy, chin-length lavender-white hair, indigo tareme-style eyes, and thin-framed round glasses. She typically wears the school uniform but dons light, casual clothing outside school settings.

Personality-wise, Chitose exhibits a gentle and calm demeanor, often speaking in a soft Kansai dialect. She enjoys slicing and consuming pickled vegetables. A defining trait is her intense yuri-themed delusional fantasies, primarily focused on the romantic pairing of Kyōko Toshinō and Ayano Sugiura. These fantasies trigger when she removes her glasses to concentrate, frequently resulting in severe, near-fatal nosebleeds.

Chitose befriended Ayano upon entering middle school and remains her closest companion, often encouraging Ayano's unspoken feelings for Kyōko despite potentially harboring her own romantic feelings for Ayano. She maintains friendly interactions with other characters, offering Akari Akaza pickled radish and discussing adulthood with her.

A recurring plot element involves her extreme reaction to chocolate consumption. Ingesting chocolate, particularly varieties containing alcohol, induces a frenzied state where she attempts to kiss everyone indiscriminately, including her sister. This state resolves only when Ayano kisses Kyōko's cheek, causing Chitose to collapse from a massive nosebleed.

Academically competent, Chitose occasionally appears in the top ten exam rankings. Her presence reinforces her role as a catalyst for comedic situations through her delusions and their physical consequences.