Scar turns away from the sink just in time to see Envy slorphing down what remains of the "milk" at the bottom of his bowl. His eyebrows pinch just up enough that one might (reasonably) assume his horror at the concept of putting such a concoction of substances into one's body. But he makes no comment.

As he follows Envy upstairs to wait by Wrath's room, he stays a comfortable body's length back.