Protector

Maybe, maybe,
I was waiting
And do daily
I am fading

Maybe, maybe,
You can't see me
And you've got eyes
But are they working?

I'm the protector
I save your life
I guess you can't see that when
You don't see me fight

But here I am, regardless
With an invisible sword
You have watched me sharpen it
But you don't know what it's for

She screamed at night
But you never heard
If you want me to disappear
Then just give me the word