@Medical:
I think Trebol might be even more hopeless than Gedatsu. Goddamn this guy has so many issues…it's like Oda was trying to cram 50,000 quirks into one character. He goes all out to kill a fly, he doesn't understand personal space, he inserts random "but"s at the end of sentences, snot runs down his nose when he laughs, he's overall a really gross person...if Doflamingo and crew get arrested once all this is exposed, they should put Trebol in a psych ward.
I don't think is "but"s at the end of sentences. I believe "Ne" is basically asking for confirmation like "…, right?" for example you ask what is the book that you have in your hand(An One Piece book) and I respond "An One Piece book, right?"