He could say he doesn't know. Certainly it's not unreasonable to have no idea what to say about an aura he's had less than twenty four hours, that may not mean anything at all. But he's Alec, who knows himself well enough to piece back everything about himself that's been broken apart multiple times, who is unsurprised by the way the red heats up and starts to burn away the green the moment Lark draws attention to it.

His voice is calm as a shrug, too calm, despite that: "Fear."