The elf pauses at the firm, final way that Link speaks. He thinks that he could talk himself black-and-blue over this topic, but his little cousin won't listen to him. So, Nero doesn't see much point in carrying on the argument.

"Guess that's what you'll do, then."

It, at least, answers the question that he had before: what will Link do in this world? Find a way back to his old one. Nero thinks that after a few months, after a few years, after a few centuries, that Link will grow tired. When that happens, they can have this chat, again.

Hopefully, the world won't be destroyed too much by then.

"I like this food." He says abruptly. The mood of the conversation shifting just as violently as his tone. "I could really eat it all day." It's the end of whatever talk they were having before; Nero doesn't admonish or praise Link on his decision. He merely accepts that is what is going to be done.