"TK?" they ask with an impressed tone in their voice. "Cool." And they're no stranger to diving into the unknown when they need to, so they head down the hatch with little fear.

Something that might do them well here, though, because they're not sure exactly what to expect. However, they know they're underground, and they know that the odds are it won't be as bright as they'd like it to be, so the electricity sparks to life on their palm again and condenses into a just-barely-hovering ball in their open hand.