Keep looking. They're no more an airline than they are a figment of everyone's imagination. They've advertised the chief pilot job for the better part of a year, have no airplanes and no infrastructure in Hawaii. Of course, they could just show up one day and bring a dozen ATR-72-500s with them. But I wouldn't trade a seniority number somewhere else to find out.
I used to live in Hawaii. There was an ATR operation called "Mahalo Air" for a couple of years - but they folded. The interisland competition is fierce between Hawaiian and Aloha. Nobody is making much money over there for now. If anyone is trying to start an ATR operation in Hawaii, I would suspect it's a scam to bilk some investors out of their money.