To me it's Saria hands down.
I always got the sense that Saria had a sort of matriarchal wisdom and maturity well beyond the other Kokiri. It's seemed to imply that they look up to her like a sort of big sister. Probably why she's a sage
Of course my girl Midna is a wicked lil cutie pie
Of course Agitha is supposed to be ridiculously over-the-top KAWAII!! but I always found that crazy little bundle of cuteness and neurosis funny. She fits right in with TP's brand of dark quirky humor.
Malon/Romani are totes adorbs :3
Dampe is kinda cute in his way. Ugly or not he doesn't seem to mind being a groundskeeper and being a source of amusement for folks, even in death! He seems like a playful and jovial sort, with fascination for mechanical contraptions.
The girl who chase the cuccoo in the market square is koote. poor cucco >.>
The skull kids are kinda cute too ^_^ I like how they just show up and be leik "Yo we gunna play a game, kay? here go!"