There's a frown now. What? Sion knew the Hero was trying to consume him, that's why he was in pain. He didn't realize it could be seen. Even bringing up the Hero had been a mistake, so he tries for deflection. It almost felt like a migraine was starting, an odd sort of foggy to everything.

"I didn't.. realize things could be seen. Maybe I should have.. taken Froaude more seriously. He did say something about darkness..." It more lies - he does know exactly what it is, and he knows that Froaude couldn't have seen anything...

And he's starting to feel like his body isn't his, his expression slipping toward vacant. Sion's emotions slip further away, and a chaotic mess of madness starts. Whatever that darkness is, it feels angry in a way that suggests it thinks something here has personally wronged it.