Mina Kotobuki is a second-year student at Reimei Academy, radiating an exceptionally cheerful and energetic personality. Her boundless optimism and genki nature define her, often propelling her into impulsive actions that result in comedic situations or minor troubles.

Beneath this scatterbrained exterior lies a strong sense of justice and fierce loyalty to her friends. Her determination becomes formidable when focused on a goal. As a member of the school's Go-Everywhere Club, dedicated to helping those in need, she acts as the team's emotional heart, lifting morale with her infectious energy.

An orphan raised at Kotobuki Shrine, she serves as a miko, or shrine maiden. This role extends beyond ceremony; she is formally trained in the naginata, revealing a proficient combat skill when necessary. Her connection to the shrine's spiritual traditions occasionally grants her insights or abilities relevant to supernatural events.

Her growth centers on the deepening bonds with her fellow club members. While her core upbeat personality remains steadfast, she learns to channel her enthusiasm more effectively, becoming a more reliable supporter. Her orphaned background fuels a profound appreciation for her found family within the club, driving her desire to protect them and their shared purpose.