Victoria of Many Faces, Vol. 3 (light novel) — SYUU

Victoria is passing her days peacefully with Jeffrey and Nonna when she happens upon a woman being chased by ruffians. She saves her, only to discover that she is the body double for the crown princess of Ashbury! With the woman injured and unable to do her job, Victoria willingly steps up to the plate, taking her place and proving she's still got what it takes!