It would be nice to know what exactly happened to make Leon the scapegoat for everything that went wrong (from the humans' pov). Perhaps he will bother to tell the princess. Assumming the princess uttering the traitor's name aloud doesn't gather so much unwanted attention there's no time to talk at all.
If it's Aria at the cover, I have this theory that Aria also has the same situation as Leon where Aria has the raped wife of the uncle that used Leon's body.
nah, Leon spared the demon chick since her expression showed that she dying would be a relief rather a tragedy. The same why he decided to go all out in saving Aria as young - her expression that was of relief