Speaking of light, there's a source of pink-purple glow around the corner, along with a stronger flashlight beam. And then there's Indigo, looking around as she explores the caves; she can't turn the light of her Matter Manipulator off, so she might as well use it. Upon spotting Kaiba, she waves and after a moment of hesitation, approaches.

"You explorin' too? Ya need any help?" She's friendly enough (even if she can't show it with facial expressions due to the lack of face), since she hasn't learned what Kaiba is like yet.