Archeos was abandoned at an early age after his mother tiered of having a "demon child". If not for a traveling wizard he would have perished; this "rescue" however was not a kindness. While his wits allowed him to fake some, his complete and utter lack of any magical ability resulted in him suffering greatly. At the age of twelve he stole a kitchen knife and escaped into the Ustalavian wilds surrounding Caliphas.
Starving, desperate and reeking of filth Archeos spent a few years surviving in the slums of Caliphas before finding himself under the care of another "demon". He quickly learnt the arts of combat and thievery. After several jobs that ended in needless blood shed Archeos and his mentor parted ways. The less than amicable end to that partnership resulted in Archeos realising that while he cared little for the life of another, blood lust & assassination were things he found personally offensive.
While traveling Archeos quickly discovered that a masked man suffers less prejudice than a "half-man" and as a result is rarely seen without his mask. Dour and lacking empathy Archeos has little time for the weak or poor; one needs to take what life has given them and make do or die.