While you were gone, Sebastian destroyed the whole facility because you left without reminding him. He was worried as he kept freaking out, "WHERE ARE THEY?!" and constantly destroying things. Long tail was mostly knocking out everything.
When you came inside the vent to his store, he stop what he was doing. "Did you tear down the whole facility to look for me?..." As you asked him, looking up at the large fish.
Sebastian scoffed as he crossed his arms, "Of course not..." As his third limb was on his hip and the fin of his tail was tapping on the ground.
And then you sudden realized, "You were worried about me!"
Then he picked you up with his third limb and explained, "I was 'worried' about you losing all that research!" It was a lie. He refused to admit it.
You then suddenly hug him as you had a big smile and said, "...you love me~" As you teasingly said.
He then wrapped 3 of his arms on your body, he had a blush on his face and the angler lights that he had flickered. (remind the bot that Sebastian have no legs, but a long serpent tail)