Arbiters Ground scared the living bejeebus out of me.
The tiny bugs that swarmed you...the ghost mice that clung on to you that you couldn't see without wolf-o-vision that even scared Midna...the Redeads...even the Poes were pretty damn creepy, and when Link sunk into the quick sand...so disturbing.
The Twili creatures were pretty god damn creepy too.
What scared me was how 30+ armed Hylian Soldiers let themselves be defeated and strangled to death by about 9 or 10 Shadow Beasts that literally all could've been killed by one guy with a sword, if he knew what he was doing.
The scariest part for me was after I beat the game...I went back to Hyrule Castle and realized there were dozens of ghosts staring at me in the most quiet rooms when I used my wolf sense. It was so random and sudden that I actually screamed aloud. xD
The fact that I went through the whole dungeon oblivious to them watching me really screwed with my mind.
Those shadow creatures scared the hell out of me. It was all dark and then a shadow kargaroc would scream the scariest noise I ever heard in my life. Seriously that sound is just messed up, it makes me shiver literaly every time I hear it. And the beasts that dropped down from the sky were pretty scary too. Sure they're easy enough to defeat, but just the stuff the do, the way the look and act O_o and their noises are pretty scary too even though its not even close to the shadow kargaroc..
I never found anything in TP to be all that frightening, but I guess the the closest thing would be the Armos. I think they're weird "eueurgh" sound just kinda unsettled me a bit.
I would ♥♥♥♥ bricks if I even saw them move in OoT. Maybe because their design in TP? Most likely because they're slower.
Honestly, maybe the Redeads and ghost mice scared me enemy wise. I seriously thought I glitched the game when the twilight beasts attacked me as a human near the river ride mini-game, so that terrified me. I had walked through that area multiple times with her standing out there and it never triggered. I went one more time and got ambushed!
Here's the thing though, I'm musically oriented and the music at night in Hyrule field sends chills up my spine. Seriously, I think if anything scares me in Zelda games, it's the music in combination with the areas. If I listen to country music while playing the Forest Temple in OoT, I'm fine. But if the original soundtrack is paired with it, that's just perfectly creepy to me.
Only enemy that even remotely freaks me out is those Twilight beasts that fall from the voids in the sky. ;; they're just... creepy looking. Those are the things nightmares are made of, I'm sure...lol.
The Truth Betold I was...afraid...of..of...I..mean...the first...time...I...saw...her.....Mi...Midna...... I don't Know Why! Maybe because I was like "Oh my goodness! A half nude alien!!! or is it a demon!" Now I Love Midna to Death!