Noodle

He's a loyal and noble dragon who seems to be the only one not clued into the fact that his wife is kanoodling with someone else entirely. He's come to love and respect the DeepSea Clan and everyone in it- Even if he doesn't quite approve of the arranged marriages Angler set up for his children. In fact, he's spent so much time here he's had more and more time to bask in awe at Sweetie's flawless leadership. She's just so kind to everyone she meets. He's found himself smitten with her over time.
Which to him feels like an utter betrayal. He berates himself when he's alone, saying he can't look at Lady Sweetie that way. He promises never to act on his feelings, but the guilt just won't go away.

Lady Sweetie has found that Noodle has a love for books and knowledge- And also that he's very articulate. Since he's staying here, she offered that he become the personal tutor for her hatchlings. He agreed happily! Anything to be of use to Lady Sweetie!
But it turned out to backfire on him greatly. Her hatchlings are wonderful... But they remind him so much of her. He can't escape his infatuation no matter what he does.