Meiko Ôtsuka is the president of the Manga Studies Club at Suzaku High School and is identified as the third witch encountered by Ryu Yamada and his friends. Known as the Thought Witch, she possesses the ability of telepathy, which allows her to communicate with anyone she kisses. This power also enables those who kiss her to hear the thoughts of others as well, and users can even transmit images, a function that another witch, Nene Odagiri, compares to using a cellphone.

Meiko is characterized by her shy and reserved demeanor. She developed her telepathic ability as a direct result of her personal struggles with verbal communication, stemming from a difficulty to speak out loud. This quiet nature means she is often seen wearing glasses, which contributes to her studious and introverted appearance. Her involvement in the story begins when the Supernatural Studies Club seeks her out to understand her power.

A key aspect of Meiko's personal journey is her admiration for Ryu Yamada. Notably, she developed this affection not for Yamada himself initially, but for Shiraishi while she was inhabiting Yamada's body through their body-swapping power. This confusion of identity highlights the complicated social dynamics created by the witches' powers. Her role in the narrative primarily revolves around her position as one of the seven witches who must be gathered to potentially grant a wish. Through her interactions with the Supernatural Studies Club, she steps out of the isolation her shyness created, using her power not just as a crutch but as a way to connect with others on her own terms.