Thanks guys! I really appreciate your compliments

I know I haven't posted in a long time, And I know I don't deserve any cookies but here is anyone that I made up when I was playing tennis and bored.

It's a riddle of a character from HP, see if you guys can guess it You kind of have to think outside of the box a little bit. ignore the first line! It tells you nothing about the character And btw, it know it doesn't rhyme, they're NEAR RHYMES.

I am cunning, I am sly.
I spy you with my tiny eyes.
When all is fine and all is safe,
I open my large, big eyes.

I am always smiling,
If you look on the right side.
Do not let that fool you,
My smile is just a lie.

I look outside and see a bird.
I wonder what it's like to fly.
I look down a stream and see a fish,
I let down my hook, haha! It's mine!

I will explain after the guesses