Why don't you voice this very concern directly to that person? Does the culture you're about to build in your company includes honesty and sincerity? Probably n

Why don't you voice this very concern directly to that person? Does the culture you're about to build in your company includes honesty and sincerity? Probably not, because it seems that you believe people are not supposed to say what they actually think. In that case you should certainly avoid taking him on board, he won't fit.