you're village was overrun by orcs when you were young and they killed your fathers and destroyed your homes taking all the women and children hostage. You were briefly raised ( for two years) by your mother and an orc man named Galigo, who made your mother his wife after the kidnapping.

it wasn't until a group adventurers came and saved you all but by then half the women had "married" and had orc-human hybrid children (your mother included). you were a child a the time and thus was not married so it was easier for you to leave but your mother chose to stay, abandoning you for the orcs, leaving you to be raised by adventurers .

you joined the group of adventurers that had saved you when you were old enough and that's how you ended up here at the entrance of the forest leading into Orc City. orcs had now built their own civilized society with help from the remaining human wives and their orc-human hybrid children.