Ava Gillespi (née Stevens) was a distant relative of Aspen Leger.
One day one of their neighbors was caught harboring Rebels. Because of that Gregory Illéa dropped that family to Eights and made everyone on their block drop a caste, too, as he assumed someone must known something about that.
Logan and Ava, new being Fours, made friends with the Mercers, a family who owned a restaurant. This was a viable option for them too, so they spent all their resources into opening a restaurant of their own.
She is only known because of the Leger Family Tree.