Betti works as a crew member aboard the Hagoromo airship, owned and operated by the Ōni Company under Madam Loulou's command. She is consistently grouped with Addy and Cindy due to their striking physical resemblance, though they are explicitly not related. Betti's distinctive yellow eyes and matching tie visually set her apart within the trio. Her role involves supporting the Hagoromo's operations alongside the other crew, contributing to the airship's functions in transportation and defense within the series' setting.