Artificer swap au where one of her pups survive at the cost of her and the other pups life and the surviving pup harbors all the rage and grief of her families murder.
Her and her sister run away from the scavengers that killed their mom before one falls into the leech-infested water and neither know how to swim so she helplessly looks down at her sister before having to continue running because of the scavengers
She then finds a shelter and over time gets more used to living on her own, and kills scavengers on sight. It's essentially just the Arti campaign but you play as the pup.
I'm not entirely sure what the timeline would be like, but I'd assume it took a short while for them to learn how to survive on their own and by the time they actually start venturing out and gain the confidence to avenge her family she'd then be around Monk's age.