Lord British

In the Ultima series, Lord British is actually the brother of the Avatar (i.e. Main Player Character) and continuously provides healing, ressurection and other miscellaneous help for the Avatar's adventuring party. Both the Avatar and Lord British were not born on the world of Britannia, but came from Earth via the moongates. When Lord British came, the world of Britannia was rife with the chaos caused by an evil wizard named Mondain[?]. The stranger (who would become the Avatar) dealt with Mondain, but 3/4ths of the world of then Sosaria disappeared as a result of Mondain's spell. Lord British established a peace in what was left of the world (with the exception of the Serpent Isle) and became King of Britannia.

Numerous plotlines and side-quests in the Ultima games revolve around one of Lord British's adventures or public works projects. He had a key role in founding the Museum, Conservatory and innumerate institutions of the Britannian society.