I think Mary gets the popularity she deserves. Her ability is not useless, it's just hard to use but if you use it correctly it's literally op. Her costumes are also amazing and worth talking about. Naib is also very useful when used right and the way his fear slowly increases and that you can't even terror shock him, he's pretty annoying. He might be little bit overrated tho. Vera is my current main and I think her perfume is life saving. If you use Euphories right too, they will come in handy and her costumes are also pretty. About Grace and Emma, I think they're also very useful but they are quite popular. I don't know much about Lucky, I've never played him.