Fairly often in fiction, a Dedicated Loner character will appear. He (or more rarely, she) is pretty useless, evil, or just a little strange. However, sometimes these Switzerland types are in possession of just enough power to sway the final battle, should they choose to get involved. If they do, the chances are excellent that they'll end up throwing in with the Good Guys at the very last minute and providing the decisive element in the victory over evil. Sometimes they provide a little more decisive element than necessary. Defaulting To Good is sometimes a Changed My Mind, Kid moment.