The kestra'chern doesn't have his ornate, open-cut wing-style outer robe on, currently. So the blanket is standing in for the 'wing' he finds quite natural to drape over someone who is distressed. Even if he's distressed in a very wide-ranging and rather low-key way.

"This lifebond... it's Velgarthian," Amberdrake muses aloud, "I've had more experience with them, now. Both from the outside and from the inside. I couldn't hurt you, enar ves'tacha. I will never, ever want to."

He'd sworn once on Haven, long before they'd had any sort of bond, that he would never intentionally hurt Sanzo. Now that a lifebond was involved, it was guaranteed.