Unfortunately, Thalius never saw the attack coming, and Sikke's yell only made him glance over his shoulder, not sure of what the knight was yelling about. When the sword hit his wing, he found quickly enough. The sudden feeling of delicate bones breaking under the blow got a scream out of the incubus before self-preservation instincts kicked in.
He yanked the injured soldier away from the wall, and spun him around in front of him, managing to throw himself off balance and slam himself against the wall. Not quite able to suppress the whimper when his wing banged against the wall painfully, he decided that there was no way he was going to look at the damage until the fight over. It felt bad enough already.
There was no way he could keep fighting like this. So...time for Plan C. Run the hell away. But...he had a feeling that running would to prove to be a BAD mistake. Tightening his grip on the soldier's shirt, he pressed his claws against the man's neck, digging in just a little bit.
"Back. The hell. OFF." He paused for a moment, trying his best to ignore his wing. "If you don't, soldier-boy, I'm going to slit your friend's throat. I mean it."