The two main characters in "Of Mice and Men" are:
* George Milton: A small, quick-witted man who is responsible for the well-being of his mentally challenged friend, Lennie.
* Lennie Small: A large, strong, but mentally handicapped man who is dependent on George for guidance and protection.
Perhaps you are thinking of a different book or character?
If you can provide more information about the book or character you're looking for, I can be of better assistance.