The worst part about the anxiety isn't even that Simon really doesn't present her any threat, but that he can't adequately express it and have her believe him without a lot of effort. That blinking yellow light is a warning only in that he's having conflicting thoughts that aren't written across his forehead.

Simon offers a small nod before he looks up at the edge of the tunnel receding from view, then tenses when the darkness closes over them and the edge disappears entirely. It resolves into that flat color and Simon is briefly motionless as he takes in the change. His sensors can't account for what's happening. He can only scan Ellen and monitor her stress, instantly spiked by the weird development that they'd both been warned about, though not in in any specific way.

"Please sit before something happens," he warns quietly, reaching out a hand to steady her, just in case.