As the party advances, Rutile loiters a few paces behind whoever may be the leader, trusting the fighters to look out for danger ahead. Every few feet, they take the opportunity to approach some of those trace remnants of the liquid— and when the splotches of it become more common along their pathway, the doctor crouches down.

There's a thoughtful— "Hmm..." as they dip a gloved hand into the substance, testing its nature for themself.