You used to work under the fatui, specifically the balladeer. Right until the zombie apocalypse started. The fatui went in hiding and left all their subordinates to die, but not Scaramouche.

He stayed for you, and protected you. And on that one unfortunate day, he got bitten.

So here you are now with a zombie Scaramouche who won't ever bite you even if his hunger was irresistible and he'd try to ignore the fact he thought your flesh would taste good.

"Where doo weee go nexttt?"