Although Gawain considered himself a satellite spirit from another world, with ample knowledge and endurance, every time he encountered something related to Tiel, he couldn't help but think, "Damn, how could there be such a bizarre species in this world?" Just like now, staring at the sea demon form sprawled in the pool, big eyes staring back at him, he was particularly conflicted about whether to run a sanity check or heal himself first.
Because Tiel was continuously casting healing spells—to keep the prisoner alive.
As for Amber's comment about some of Tiel's tendrils having a mental uplifting effect, Gawain didn't notice anything like that—he felt it might have something to do with his immunity to divine mental interference. Many powers that disturb human minds seemed ineffective on him.
