Originally Posted by
Kraco
It's his job because he has made it his job. His very behavior revealed that explicitly. Fran doesn't give a damn about his job, nor does great many other adventurers, I bet. From Fran's pov, the dude is someone trying to hold her back and slow down her progress toward her dream. All she needs is the sword.
It's her business. She's the kind of person who rushes forward and subjects herself to deadly dangers to grow stronger. She would be dead without Teacher, but she has it, so that's it.