I actually found it difficult just to pinpoint ten. There are many disturbing characters in the series! Here's my list:
10. Lake Scientist
Just look at that great complexion! No seriously, this guy creeped the nine-year-old me out.
9. Pamela's father
His contorted face always disturbed me.
8. Possessed Zelda
Her character was so royal and pure. Then this happened.
... Her eyes.
7. ???
HELLO. Ok, what's up with this? Did someone just decide one day,
Hey, you know what would really scare those ten year old kids, a hand in a toilet. Yea, you heard me right, just a hand. Let them imagine what the rest looks like. Goold ol' Nintendo.
6. Majora
Because the moon just wasn't freaky enough.
5. Dead Hand
I don't think I even need to say why on this one.
4. Gibdos/Redeads
I DON'T WANT A HUG. Ok, these guys were just plain creepy. I legitimately had nightmares because of them. I think it was their scream that freaked me out more than anything, and the fact that you were frozen if you got too close. The box said E for everyone...
3. Tingle
.....
Yea.
2. Falbi and Fyer
I'm not even sure what to say. It's disturbing on so many levels.
1. Ghirahim
In my opinion, Ghirahim is the most disturbing character in the Zelda series. From his diamond pattern outfit, to his personality,
and don't forget that tongue he is the pinnacle of creepiness.
Well, there ya have it. Honorable mentions go to Death Sword, Giovanni, Oocca, and
Honey & Darling. <- I totally agree with you Ventus!