To be fair, most people probably haven't even seen them (the fate episodes).
Azusa's personality also left something to be desired, but she's also caught at a low point. Possessed by a demon sword, amplifying her grudge while slowly killing her. Narmaya herself probably would have ended up in a bad place if she hadn't met the danchou. Kind of like Okto went on a journey, lost himself, until decades later when he was found again. Narmaya skipped that part of her journey because of good fortune.
I would love if she joins and redeem herself helping Danchou and Narmaya at some point hopefully soon but there has been a lot of NPC that need to be playable. They even skip the new society member for later.