When Jack loosens his grip, Serph likewise mirrors the action with his arms while he pulls his wings back

Serph glances aside at the compliment, awkward, but the smile remains on his face. It's a little uncomfortable hearing such an openly positive feeling directed his way, but in a pleasant way. He's reminded a bit of how Sera makes him feel, of how the others needed him to be strong but she needed him to be gentle, helping him realise there's more to life than just fighting.

They both make him feel like he can be a better person.

His gaze returns to Jack. "You are, too." He feels... good in a way he hasn't since his arrival. "...Thanks."