Serika Shihōdō stands as one of three main characters dedicated to safeguarding their town's peaceful order. She achieves this by transforming into Kigurumikku-Swallow using a specialized cosplay outfit, embodying the "kigurumi" style that grants the wearer the appearance of a giant plush toy or doll. Serika fulfills this protective role alongside her companions Azuki Edomae, who transforms into Kigurumikku-Swan, and Mutsumi Mutsuki, who transforms into Kigurumikku-Falcon. Details regarding her background, personality, development, or appearances in other media such as seasons, movies, OVAs, or spin-offs remain unrevealed.