I have had this happen more then once, but two stories stand out;
1st) 3.5 I had just drawn up my ninja (Comp Adv) and the DM said "Since no one is a rogue I will draw up an NPC rogue...after many attempts to explain I might as well be one I droped it. we were 3rd level, but he wanted an extra feat so he made his 6th level...great start. He always called dips on items, and always had way more skills, damage everyhting then me...
2nd) back in 2e we had Mr Fluffy...
....his back story was he was a paliden (epic level) that fell in love with the daughter of the evil necromancer...she was good, until the day her father killed Sr whatever in front of her and she snapped, killing the necromancer and going com pletly batty. His love animated him as a Death Knight
now they live togher in this town where she thinks of him as just a servant, not realizing she has no real 'control'...she was a 35th level necromancer with no touch of reality...he was a 2osomething paliden/death knight...and the DM always had a reason for him to tag along...
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