Princess of the Frozen time

Agrimmas, son of one of the first gods, an unstoppable being that waged war against the angels and failed with its life ended but obliterated most of them. It resulted to earth's vulnerability to be attacked by hell. Four devils under Agrimmas' command has survived the war and followed what their master wanted to do. Create a new army, find the gate on Kara, open it, start there and wipe everything out. So the sky sent a few of their remaining capable angels to hunt them down.
Number of kills are counting.
A man from the future that has no idea what he was doing on his time machine.
A man from the past that has no idea he had been involved on a time machine.
The next chief of their clan that was not fit to become one.
The young man that chooses to forget what happened to his family and to live as a beggar on a place that he has no knowledge of.
The unidentified hero who wore armors to save an island.
The smart who had been outsmarted by an unidentified voice and forced him to supply it blood in exchange for the promise of giving back his parents alive.
The best-friend,
And the bored 16 year-old Nik that dreamed of a superpower to maybe use it to save people. And so he became a monster, created to kill angels.

Yes, he was designed to mindlessly kill angels until he discovered a concealed intention by someone; "Trapped in time. Save the princess to save the kingdom" and with a nod from his irregular heartbeat who fell in love with that someone, he decided to do something about it with however one problem; "You may give those who are trapped in time a life to live again but you must give up the life of your friends and yours."