One of the Saintia, Athena's personal bodyguard Saints, who wears the Equuleus Bronze Cloth. As she has mastered her Cosmo, she is able to channel it in a powerful and fast attack, the Equuleus Meteor Punches (エクレウス流星拳 Ekureusu Ryūsei-ken).

Spoiler

It's later revealed to be a daughter of Olivia, the leader of the Saintia.