Lelouch Vi Britannia from Code Geass.
Rivalz from Code Geass, because he was the most minor character out of Lelouch's friends, yet my personal favorite.
Lord Jeremiah Gottewald from Code Geass, he was the perfect example of upholding one's loyalty.
Roy Mustang from Fullmetal Alchemist, simply because.
Toshiro Hitsugaia(sp?) and Rangiku Matsumoto from Bleach, both separately and together. Their relationship is rife with subtle (if forced?)sexual and political tension, despite the fact that Toshiro looks like a child.