Dar initially regards the newcomer sprite warily, assuming that it's a messenger. After Noir calls out her name, however, he realizes her true nature and gleefully runs over "Shifter! Dar'yajira was worried, very worried for Shifter! It thought Shifter was dead, but found its nature far away, and cat feared it was lost! But now Shifter is back, it can help save Halfdragon!
He pauses there, lowering his head and thinking for several seconds. "Halfdragon was wounded when it landed. Dar'yajira as well, but it fell better. Cat considered leading Halfdragon to Shifter, but the distance was too far, and too bare; instead, it led Halfdragon to food and water, or... the closest it could find to such things." He looks back over at the lichen, and the dew that's begun to collect along the surface of the metal. His ears fold back and he continues in an apologetic tone "...Dar'yajira is still unsure lichen is safe to eat. It simply could not sense any better, not in this dead nature. It also cannot smell nor hear prey, which worries it; if plant is food, it is eaten."
Dar fills in Aylia on what happened since the fall into space, then assists her in whatever way she requests. Not sure how a thumbless feline can help make a catch basis, but he'll try his damndest. Edit: She apparently wants him to help form large metal plates. He'll buff his strength as much as possible, perhaps reapplying the metalcat buff, then try to find a large metal plate that's mostly level with gravity. Then, he'll try to smash the center in, and bend the edges up, hopefully making a bowl-like shape. If that actually works, he'll then dent a second sheet... and I guess try to bite a hole into the center, if metalcat form was successful.
If she doesn't need his help, he'll hunt around for some vermin. Presumably something eats the lichen if it's edible, that's how nature normally works when not in a dead metal world...