Fran

Fran is the main female protagonist of the Tensei Shitara Ken Deshita story.

Background
Her parents took her on adventures ever since she was little to evolve. However for unknown reasons, no one from her black cat tribe was able to evolve. Her parents passed away before finding out the secrets of evolving. After losing both her parents, Fran decided to follow in their footsteps to discover the secrets of evolution. Unfortunately she was captured by slave traders, and lost her freedom for four years.

Master
He is Fran's intelligent sword and mentor/guardian.