Gandalf

Gandalf (or Olorin, or Mithrandir, or Grey Pilgrim, or Lathspell, or several other names) the Grey (or the White, or Stormcrow) is one of the Istari (wizards) in J.R.R. Tolkien's stories about Middle-earth. Before he fights a Balrog, he is known as Gandalf the Grey, when he returns (presumably from death) he is known as Gandalf the White. He's a bit of a mastermind, really, as it is his planning, knowledge, and persuasion that get people to go off on adventures and do the things that need to be done so that evil doesn't take over the world. He's also, at the same time, a nice, comforting, wise person to be around; you generally get the feeling in the books that 'Gandalf's here, it's all going to be okay'. At the end of the Return of the King, Gandalf ships out to the Undying Lands with Galadriel, Elrond, Frodo, and many others, and is never seen again in Middle-Earth.

In Suefic he has two main roles; either Designated Misogynistic Bastard or discoverer of the Sue's talents and the person who recommends her for a place in the Fellowship. Probably fortunately for us all, he doesn't feature too often in badslash, although he does make a fair number of appearances in crackfic.