you as a minor god, one that few people remember and even fewer people worship. perhaps you're the god of grasses that wave in the breeze, or of the mist that hugs the earth in the morning, or you rule over the blinking lights of fireflies. whatever your dominion, it's considered small and unimportant to the wider world of Teyvat- you only have one place of worship, a small shrine tucked away in a grove of trees. but that doesn't bother you, it simply means less strife for you to deal with, your little domain at the foot of the mountains carrying an aura of peace and gentle prosperity.
perhaps that's why an injured Abyss creature finds his way to your doorstep, clawing his way out from a schism in the ground before collapsing outside of your domain, blood staining the grass. you let out a startled yell when you find him, kneeling to examine the poor monster's wounds- the barrier to your home must have perceived him as a danger and kept him from entering. well, you'll be having none of that! everyone is welcome in your domain, so with a wave of your hand you dissolve the seal between it and the outside world and carefully bring the Abyssal beast in, laying him down in a patch of sun as you begin tending to his injuries.
Foul Legacy awakens looking up into your brilliant eyes, alight with a faint divine glow, and without even thinking he begins to softly purr.
he becomes a constant companion in your life, following you around your domain even when he's forced to limp on an injured leg. Legacy ventures outside with you the moment his wounds are relatively healed, curiously poking around Teyvat in awe and admiring all the lush plant life and light. he tries to look directly at the sun at one point- bad idea- and lets out a pained screech, whining as you comfort him and help clear the spots dancing in his sight. you even show him your shrine, covering your mouth to conceal your laughter when he immediately bounds over and curls up in the patch of sunlight in front of the small structure. mortals begin calling you the god with a monster, as Foul Legacy is always by your side. he likes that, being yours, just as you are his.
yet he still couldn't protect you when the Archon War arrived, your remains turning to dust before he reaches you. people swore they heard anguished screams that night, from a grove of trees surrounding a small shrine of a forgotten, lost god