Belldandy (AMG)
Ryoko (Tenchi Muyo) - Who is damn near the opposite of Belldandy in everyday disposition.
Kiyama Harumi (Railgun) - First an eccentric. Then helpful researcher. Then mad scientist. Then super villain. Then heroine.
Reki (Haibane Renmei) - Again, a sort of contrast with Belldandy. Is it better to be born good and stay good? Or is it better to be born bad and become good?
Asuna (Sword Art Online) - Particularly where she jumps the boss of the 74th level, even though she is damn near terror stricken.
Honorable mentions
Saber (Fate/various) - Really wanted her to stab the idiot who kept yelling her name at each moment she needed to concentrate. Finally, he grew up a little.
Arika (Mai Otome)
Major Kusanagi (Ghost in the Shell)
Insane Black Rock Shooter (Black Rock Shooter) - Stop hitting yourself. Stop hitting yourself. Stop hitting yourself. Pushing the boundaries of tough love.
Grand Duchess Spoor (Banner of the Stars) - Like with Ryoko, has a "not sure if I'll live through this" vibe.
Misaka, Kuroko, Uiharu, Saten (Railgun) - They're kind of a team. Even though Misaka has to keep re-learning that.