I honestly trust Kiwi more than Light here. On the off chance that Pein and Rhea are both maids, I would actually suspect Light the most. Yes, the maid isn't a unique role here, but Light definitely acted like he knew both of them are Blue Dragon.
His vote on JDB can tell us that he had no intention of sorting out the deal between Rhea and Pein, because his vote literally served to pressure someone else, who wasn't even among the results that the two players had given.
If anyone is an invoker, I actually think it's Light tbh.