A great hero in life Nikolas was once a soldier for hire famed for being one of the best able to best any beast in the land. This however is in an Era all but forgotten Nikolas exploits no longer remembered by the living.
But in life he was a man to behold and man who was willing to fight for anyone who could afford his price. Gold and glory where what this man lived for and both he had. It wasn't until he was sent to kill a necromancer that had taken up residence near a small village and the locals where scared of what the magic user might do to them.

The villagers some how managed to pay his price. So Nikolas set of on a hunt to slay the necromancer. What little did he know, the job would be one he would never complete until much later. Over the course of many months on his hunt of this necromancer and several encounters with his pray he eventually fell for for his target. Over another several months the two somehow got close and fell in love. Nikolas kept "hunting" the Necromancer only to keep spending time with her. But despite there feelings they still fought trying to kill each other. Nikolas cutting down many of her undead to reach her only to...*cough*

This lasted for several years until Nikolas fell extremely ill and died before anything could be done to help him. But despite that he died a happy man. Leaving everything to his love.
Upset over the lose of her lover and refusing to let him go. The necromancer who Nikolas had called Nena out of affection stole his body form his family crypt and burnt it to the ground roughly a month his death.

Form there Nena used her magic to preserve his body as she began to work on ways to bring her lover back. Knowing she could easily bring him back as a mindless zombie under her control. But that wasn't what she wanted. Nena wanted to bring Nikolas back with his mind intact with a physical body completely free form control. But such power was beyond her and so she began to research and experiment taking many lives and souls caring little for who they belonged to.

Sadly for Nena not matter how hard she tried she could never develop a spell to bring her lover back, each failure pushing Nena into madness and after several months Nena had all but lost her mind. Driven solely by her original goal
Her actions though didn't go unnoticed and the god of death began to grow annoyed with the necromancer who constantly was perverting the rules of life and death. For a time the god had let her actions slide knowing one day she would die, but her research and experimentation bore some fruit as she made herself a lich and in unlife continued her never ending research. Having become madly obsessed with her goal.
Now furious with the necromancer and wanting to stop Nena the god of death sent their incarnate to deal with situation. The incarnate deciding to bring Nena long dead love back to life this his mind completely intact hoping that would quell the necromancer. However what happened next the incarnate never could have predicted. Not long after being brought back Nikolas had saw what Nena become. Sad to see his love fall so low he stuck her down by smashing her phylactery. An act the ended his loves unlife. But as her soul started to slip into the after life. The god of deaths incarnate appeared, quite surprised by the situation.

The god of death wanted Nena soul to punish her for perverting the rules of life and death. Not wanting his love to punished Nikolas begged the god of death to let Nena pass into the after life. In exchange he would walk the in the world of the living helping those in need it until he had paided the price for the lives and souls Nena had taken and whatever else the god thought was necessary.
For whatever reason the god of death accepted the deal and to insure Nikolas would fulfil his end of the deal the gods incarnate preserve his body with powerful magic so it would not further decay but could not be reintegrated. The incarnate placed then Nioklas's soul inside a phylactery. A phylactery that was nearly indestructible, so only those gifted in the book of blessing stood a chance at destroying it.

So Nikolas began his quest to help living, but trying to help the living is hard when your a corpse. Despite Nikolas best efforts anyone alive that meet him and became aware of his nature became afraid of him. Although Nikolas dose his best to be understanding about it. At times he finds at time all he wants to do is consume their tasty flesh. But even so he will not rest until he has paid of he loves debt and is allowed to join her in the afterlife. So in unlife he works as a soldier for hire once again using the money he makes to maintain a carefully crafted persona and help those in need. Hoping that one day the god of death will allow him to die and rejoin his love in the afterlife.

NOTE: Nena is somehow the god of death. DO NOT FORGET THIS.