World of Mitera : Awakening of the Shapers
Ra2365, better known as Ra, was designed by the best Elfen geneticists at Cycorp to be the ultimate bodyguard for the Red Vegas CEO.
While training at Blackmoor Security Services Ra was included in a test to see his resistance to a new form of knockout gas that was designed to incapacitate non Ogres, leaving Ogres unaffected. Ra had an adverse reaction to the gas that has destroyed his short term memory and has to relearn what has happened since the accident (50 First Dates). and a little slower mentally (he didn’t have a lot going on there in the first place).
After the “accident” it was determined that Ra was unfit for his intended purpose and has been working as a mercenary for the last 6 months.