Why is Peatrice so good even though Nintendo tried to make her intentionally bad?
I think her, Marin, and Zelda are the only women in the entire series Link actually reciprocates any romantic advances for.
I'm not entirely sure that she's the best, but the sheer fact that she's even a competitor with the likes of Medli and Tetra is evidence that she's truly exceptional for a minor character.
Zelda 2, Link and Zelda kiss.
And in Spirit Tracks, they even [spoilers]hold hands.[/spoilers]
Your digimon partner in re: digitize is easily the best girl in the game since she doesn't waste your time with forced plot bullshit and cutscenes all the while keeping your ass safe.