Aqua has never been particularly uncomfortable around strangers, but even he starts to get that way when he starts to stray too far from the ocean. His home, his people, his means of escape. That he still gets to be right next to the water here is nice (since Su-jin and the house's owner are close, maybe Su-jin and Aqua can come back here sometime. Between big fancy parties), and that he gets to be next to Su-jin is even nicer.

"I blend in too," he says softly, resting his head against Su-jin's arm, staring out at his beloved water. Doing what can be done to blend in with the humans around him. As a creature that removes its skin to appear no different than a human, that's not a concept that Su-jin needs to bring up to Aqua. He knows it rather well.