Nathan Wheeler is another character from "Reliqua : The Immortality Stone", a game under development by The Project ( https://www.asso-theproject.com/ ).
Nathan is an old member of the Foundation. He left if two years after it's creation because of an expedition gone wrong. He got severly injured and almost died there. One day, he argue with his sister and she went into another expedition with her husband, leaving her son William under the care of Nathan.
They never came back.