At the mention of Sybil, he simply nods, head hanging slightly. But when Aria has the thermometer poining at his mouth, Eli weakly pushes it out of the way.

"I'm fine. I'll sleep it off."

In a way, he feels betrayed by his family, by his pack, leaving him here with Aria of all people. At the same time, Eli is aware that it makes sense, this is the only choice they have. It feels unfair, though. Another trick to force him to change his mind.