(I don't own this picture. All Rights go to the owners.)

Name: Arianna Imeris aka Silver Mask
Status: Alive

Species: Dahnan and Renan
Age: Same age as Law

Gender: Female
Crush: Law
Friends: Tales of Arise Allies
Enemies: Tales of Arise Enemies
Family: Alphen (Older Brother Figure), Naori (Older Sister), Shionne (Descendant and Older Sister Figure), Shun (Descendant)
Appearance: Long silver hair in a braid, royal blue color eyes and wears a gray sundress, light brown sandals, a silver crystal rose pendant, a gray satchel and a white cloak.

She later wears Cure Beat's outfit from Suite PreCure, a silver crystal rose pendant, a gray satchel and a white cloak.

Maiden Guardian: Has her long silver hair in low pigtails and wears Cure Grace's outfit from Healin Good PreCure, a silver crystal rose pendant, a light blue rose hair clip and a light blue cloak.
Others: Her fighting weapon is a sword. The Maiden Guardian.

Sounds like Elaine from The Seven Deadly Sins