Okay so I read this in like 2018 and I remember roughly the plot so let's go.
The protagonist is kinda of a soul I think, basically they start of with no body and no memory inside a dungeon, then they discover they can inhabit the bodies of monsters, so they become a wolf who helps adventurers in the dungeon, eventually he is hunted down and killed and become a bird, i think(?), he then goes on some adventures with a guild as the bird. I think he becomes a young aristocrat girl's dog later, but that's not very clear in my memory. The only thing I'm 100% sure on is the bit where he is a wolf that helps adventurers.
I'm honestly just really curious what happens so if anyone has any ideas please throw them my way
It keeps haunting me how at his point I'm like 99% sure that the magical tools are witches who got experimented on and had their corpses/living bodies turned into weapons, and that there is a big chance the next time we see nona's mother she will have already been turned into a magic tool
we are a lot thinking the same on the magic tool, but my hope are the mother will be saved just on the thread. But i don't have high hope for the brother.