Morgen is a non-undead emotional vampire who feeds on shame; any attempt to control his emotions with mind control will ping him, and any attempt to increase or decrease shame or embarrassment will fail, but hypnosis and implanted suggestions will work fine. He pings to some, but not all, vampires as being vampiric; totally your call.

I am fine with his blood being drunk too, though he is usually drunk by lunchtime if that matters at all.