With all of Phalanx's vague answers and ambivalent reactions, this gets the most animated reaction, by far. As soon as everything starts snugging tighter and safer, the creature leans into the cocoon as if this is their only love in they whole world.

They smile and burrow and hum. And they help too--wrapping hands up into sleeves until they almost disappear, and use the solidity of Robin's body to act as one secure wall for their new nest.