I KNOW AJSDLKAJKLSDJKLASThe inevitable sibling reunion
Nimi would try very hard to refuse the offered gold haha. So he could have definitely travelled with her at least until she was sure he was all better and that he had a safe place to go to. At the very least she would bring him to a port city or town so he could get back to home or wherever he was meant to go.Niiceee he probably feels indebted to her in some way. Probably even tried traveling with her once he's recovered to try and pay it back. Or throw her a lot of money. Probably both. He probably thought he was hallucinating a leviathan until it actually comes to shore LOL
Nimi doesn't hate nor like slayers, so she would use this opportunity to try to understand their way of thinking better. ^^