Echo was watching the scene like a hawk, making sure that if something happened that she wasn't okay with she'd be there to stop it. That's why she didn't seem panicked where the others were. She was assessing and processing the situation, and the second the vines took hold of Topher and Victor she could see what it was doing.

"No, no it's okay," Echo moved after Sierra, her voice calm while she watched the vines move with a slightly furrowed brow. "It's not taking them anywhere, it's cleaning the goop off."