Hibiki Tōdō is a member of the idol group Callings, known for his calm demeanor that balances his bandmates' more energetic personalities. Initially appearing primarily during group performances, his role expands significantly after forming a close relationship with Rizumu Amamiya. Though admired as a natural talent, he diligently practices alone in a secluded spot to improve his skills, sharing this secret only with Rizumu.

He develops romantic feelings for Rizumu, frequently teasing or flirting with her and causing her to blush. Their relationship deepens, leading to marriage. To avoid fan backlash, they initially keep their marriage secret from the public for a year and a half, living separately. They eventually reveal their relationship after gaining agency approval and support from friends.

Hibiki is the older brother of Kanon Tōdō, Rizumu's rival. This familial bond causes tension as Kanon's rivalry often exasperates him. Despite this, he cares deeply for his sister and informs her immediately about his marriage to Rizumu.

Physically, Hibiki has dark blue hair and light brown eyes. In *Aurora Dream*, he sports short hair, which evolves into a longer, messier style in *Dear My Future*, reflecting his matured appearance. His personality blends a romantic side evident with Rizumu and seriousness regarding Prism Shows. He offers advice to Rizumu, mirroring the dynamic between Aira and Shō.

In *Dear My Future*, Hibiki continues with Callings after high school graduation. He supports Rizumu through professional challenges, including their joint effort to publicly acknowledge their marriage. Their story concludes with a formal wedding ceremony and a honeymoon observed by Rizumu's family.

Born in Kyoto and later residing in Tokyo, his given name "Hibiki" (echo) combines with his bandmates' names to form "an echoing show." His surname "Tōdō" translates to "Wisteria Hall."