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Cynthia (シンシア, Shinshia) (also know as Sincere in the Japanese version)
- Measurements: 78-57-82
Owner of the weapon shop in Pastalia and blacksmith of the best and most dangerous equipment, according to Croix. She doesn't hide her affectionate feelings for the latter, calling him Coo-kun, and treating weapons as 'children of their love', embarrasing him. She gets sad when another girl but Cocona is around Croix (mostly Luca) but really cares about him and is shown not to want to make him worry.
She enjoys teasing Lady Cloche, likes flowers and is afraid of cockroaches.