Yuu Tanaka: 3 books

Rumors of unrest lead Fran and Teacher to the port of Seedrun, where the intrepid duo uncovers yet another large-scale slaving operation. In their quest to liberate the kidnapped children, they find themselves unexpectedly playing guardian to a pair of twins from a very special lineage--one that might just have yanked Fran and Teacher into the middle of a civil war!

People remain skeptical of Fran’s abilities despite her achievements with Teacher, and so, accused of playing favorites, the Guild Master assigns the duo a difficult mission to prove their worth. Fran and Teacher don’t much care what anyone thinks of them, but once they venture into the snare-filled Spider's Lair, even they realize they may have bitten off more than they can chew...

Reincarnated as a sentient weapon with memories of his past life, but not his name, a magical sword saves a young beastgirl from a life of slavery. Fran, the cat-eared girl, becomes his wielder, and wants only to grow stronger, while the sword wants to know why he is here. Together, the strange duo’s journey has only just begun!