Damian found him just before and adopted him first as his servant then as his brother, once they were thrown from the immortal world into the mortal realm.
"I'm the Black God's most trusted servant," Xander said.
"Damian, he's my most trusted servant," Jonny echoed, turning to him.
I would say it was a rough lesson in history when the kings of my time learned that killing a woman with the intent to bring her back as your servant doesn't really work as they'd planned, he explained.
"A servant," Deidre said, not wanting them to hurt the poor girl.