Allyson aka Ally
She’s from a world that got consumed by the darkness. Her father and her get separated from her mother and her twin brother Nathan (they are still MIA - presumed dead). Ally and her father end up in Radiant Garden/Hollow Bastion
Ally has the unique ability to sense the shifting tides between the balance of light and dark. She experiences this gift through seeing visions of KH events in her dreams – starting with the events that happen with Aqua Ventus and Terra – when she's about four or five. Ally tells her father about these dreams, and they consult the resident expert: Ansem the Wise.
After consulting him and learning a bit about other worlds - her father signs on to work with Ansem, as her dad's naturally interested in Ansem's work.
Then along the way - Xehanort "kills" (disposes of) Ansem, and he goes into the Realm of Darkness and Xehanort recruits the workers under Ansem, and they all destroy themselves; however, Ansem pushed Ally's dad away so