The Third and Youngest Child

The third and youngest child
Cloaked in black, he stands alone.
The third and youngest child
Does anything to protect his home.
The third and youngest child
Walks a cold and lonesome path.
The third and youngest child
Bears a great and terrible wrath.
The third and youngest child
Often struggles with his mind.
The third and youngest child
Isn't helped by his own kind.
The third and youngest child
Knows his cries are in vain.
The third and youngest child
Died for another's gain.