Suzume Imamura is Yumemi Hidaka's classmate and childhood friend, forming a close-knit trio with Yumemi and Ichiko Ono. She exhibits a generally cheerful, optimistic demeanor, living at her own pace with a somewhat immature and childish personality. Despite this lightheartedness, Suzume frequently surprises others by offering unexpectedly wise perspectives, demonstrating an "outsider-looking-in" view. This insight proves crucial when she supports Yumemi's decision to help Munto, understanding Yumemi's motivations when others struggle, and plays a key role in reassuring Ichiko that Yumemi will be alright.

Suzume is in a romantic relationship with Kazuya Takamori, whom she loves deeply. They symbolically "marry" by crossing a river together, representing their commitment to face obstacles. Kazuya once struggled with feelings of uselessness and contemplated suicide; Suzume intervened, preventing his attempt and helping him find value in life, solidifying their bond. Kazuya cherishes her persistently cheerful personality.

Within her friend group, peers sometimes label Suzume as "childish," contrasting with Ichiko's athletic popularity and Yumemi's "space-cadet" reputation. She works part-time alongside Yumemi and Ichiko at a shrine owned by Takashi's family. While the main narrative conflict involves Yumemi's connection to the celestial Heavens, Suzume primarily serves as an emotional anchor within the terrestrial storyline, offering support and stability to her friends during supernatural crises.