Easy! Maes Hughes (possible spoilers here, you've been warned)
Maes Hughes is/was my favorite character. It killed me when they killed him off. What was with that! I still can't believe they did it. It is the saddest moment for me of the whole series... and then his funeral! I was done very well, but I'm still mad as H_ll that they did it.
He was great! He had those great cat eyes, so cool. And the way he brought those knives out of nowhere!
He could be absolutely insanely funny, and the next second gravely serious. He seemed to be there at crucial moments for other characters, to bad he was alone when he died. It cracked me up how he always had a picture of his little girl... yeah he was a walking photo album.
It was great to see him in the movie though. I hope they do something more with him. Bring him back into the story lines... as a good character who helps ED.
Yeah, still kills me. I put a tribute video on my profile page. I had another, but hearing My Immortal as the soundtrack for the video tribute... well it kinda' choked me up a bit. Very nicely done. There have been many more placed on Youtube since then.
But here is the one I selected:
YouTube - In Memory of Maes Hughes
There was also a very nice one that shows different characters meeting their ends.
YouTube - sad AMV-my immortal