My Very Own Baku

When I lay down in my bed at night, she always comes by.
And when my nightmares threaten to overpower me, she sucks them all away.
She is my protector by day; a fiend at night.
Her eyes shine with a loving look, but her smile is one of the most evil intentions.
I'm sure you can never guess who my dear Baku is?
Then I'll tell you:

My mother.