This is the final boss of the entire "Man the Ships" series- the Guardian Archangel. What exactly is this archangel a guardian of? Human lives. The guardians protect human lives from things like demons and such. However, the cruel thing is, they get to decide when humans die, and how they die. And once they do, they carry their soul to an unknown location. When needed, the archangel can deal extremely powerful amounts of damage to any opponent, using its dark super-abilities in destruction.
This is one of the main antagonists in the "Man the Ships" story. How? You'll find out eventually!