- Voice Actor (CV)
- Yoshiko Ikuta
- Role
- Supporting
- Identity
- A royal attendant of the Shelley family serving the Fourth Princess Sylvia as her personal maid and bodyguard within the Knight Kingdom of Loeamonn
Personality
Remarkably Capable
Sharp-Tongued
Unflappably Calm
Fiercely Loyal
Cosette Shelley is an elite operative of the Shelley household, renowned for her all-encompassing domestic expertise combined with exceptional combat techniques and intelligence-gathering skills—earning her the nickname 'Ninja Maid.' Beneath her cool, composed exterior lies a sharp wit she frequently turns on Princess Sylvia in playful banter, yet her unwavering professionalism ensures the princess's safety at every critical moment. Throughout the protagonists' journey, she seamlessly balances the role of caretaker and covert support, proving herself an indispensable pillar of the group.