Dampyr #172 (2014) page 83: Turncoat?

Sergio says he was never really on Olimpia's side, so he leaps at the opportunity to join forces with her enemies:

“Olimpia took care of it herself, without informing our gang. When she forced me to hold Mario Leone's head in my hands, that was the last straw for me. I decided that I had to get out! I've been dreaming of revenge for days. I was just waiting for someone from heaven to help me.”

“...or from hell!”

“I'm willing to do anything to destroy that monster. You can kill her, right? Olimpia told me about you, and the powers a Dampyr has.”

“Do you know where Maidalchini is hiding now with the rest of the gang?”

“Sure, that's why I'm here...”

Is he for real, or is it a set-up?