Hiro Nakamura of Heroes

The NBC show Heroes is unabashedly courting the geek demographic with the character of Hiro Nakamura. A Japanese salaryman, Hiro loves comic books and science fiction. Discovering that he can freeze time and teleport himself, he gleefully begins rescuing little girls from being run over and such superhero antics. His earnestness is both amusing and touching; he wonders gravely if he should get a costume, and when his friend persuades him to use his powers for personal gain, he afterward rebukes himself, "That's the Dark Side." In the blog the show created for him, he ponders, "Would Peter Parker do the same? I can't let Uncle Ben die because of my actions." He even gets his instructions from the perfect geek source: a comic book he gets from the future.

Links to good Hiro-centric fics can be found here.