
No, it's too late. I see it.
That ELF sticker says "To Sheldon."
The Big Bang Theory Season 2, Episode 11

The mighty Sheldor,
level 85 blood ELF...
The Big Bang Theory Season 4, Episode 19

I'm a rogue knight ELF.
The Big Bang Theory Season 1, Episode 3

and left an ELF costume
in my locker.
The Big Bang Theory Season 5, Episode 11

You do make a cute ELF.
The Big Bang Theory Season 10, Episode 12