His name is Uku, and he seems awfully mellow for a giant hard-ass prone to blowing his stack and spewing hot death.
The guy's looking for - naturally - "someone to lava." By which I think he means "love," rather than "somebody to cover in liquid rock and burn alive." Is the Trash Heap from Fraggle Rock still single?
"Lava" will play in front of Pixar's Inside Out next June.