Ellie Lore

Ellie is an alternate reality version of Xander's twin sister (a character i play in tabletop). I tried my best to transfer their story to the lore of the Forgotten Realms and the story of BG3

So they grew up on the streets of some decent-size city (idk forgotten realms lore that much so i dont care to make this fit perfectly, its just some city) She survived with her twin brother Xander and their adopted (by Xander, they didnt know their parents) younger sister, Scarlett.One day, the city was briefly sent to Avernus. (it was a rough rough draft of what eventually happened to Elturel). Ellie, unfortunately, wasn't with her siblings when this happened. She was running an errand. She immediately tried to run back to them, but she was run out of the city by imps. The city returned to the material realm, stranding L in Avernus, where she was actually faring pretty well, surviving like she always had. Although it was much more tough here, obviously.Shortly after, Ellie was found by a lacky of Zariel and forcibly recruited into her ranks.Years later, she was given to an arms dealer in Baldur's Gate. Ellie assumes Zariel threw her into the deal as a pity, or perhaps a "little bonus." This arms dealer was a to-be-well-known Enver Gortash.L played along with being loyal to Gortash, a skill she had to learn well under Zariel. Gortash was not convinced she was good enough at her job, however, and made her make an oath. During this oath, she secretly used the connection to whatever the hell oath power comes from to make her own oath. One of vengeance against Gortash, Zariel, and whoever the hell sent her home city to Avernus in the first place.
Some of the oath to Gortash leaked through however, and she can no longer directly harm him. (thats gonna be a fun fight). She now lives with these two oaths, one she believes, and one that is more of a warlock pact.DURGE SPOILERS (i think i know whats going on so bear with me)Gortash was pissed at Orin for what she tried to do/did do to Durge, so he was gonna be like oooo u bitch im gonna.. do somethn really mean to you.
Then Orin was like haha i'm gonna steal your silly little body guard and put a tadpole in them and put them on a tentacle ship.And thats how we got here.(Maybe also Orin could tell that L was BSing Gort, and rather than letting him know or dealing with it like a normal person, she just tadpoled them like the gremlin she is)