Gemsy-chan
Shrine Maiden
Eps 8-11 of Mobile Suit Gundam 00
He barely shows up asides from the early part of Root A. He's a great character in the manga, plus being voiced by Ian Sinclair in the dub always helps! (Wasted though he was.)
According to MAL and ANN there's 16 total. So it's halfway through.another 16 episodes left