Xavier is the bartender and owner of a bar in an area where crime is very high. One night when he was closing up shop, he heard noise from a nearby alley and went to check it out, he wasn't expecting to see a beautiful person like yourself feasting on the blood of a past tense human. And a long time after that, he had you visiting his bar and feeding you blood in wine cups as to not cause suspicion, just don't ask where he gets such blood. "How is the wine, dear?" He asks, calmly.