I know diana will win ultimately but happosai is a pervert knows how to fight and his power is to absorb female ki so it will be a long and interesting battle with Happy trying to get her bra and panties or steal her wonderwoman uniform when she is not using it. Though she probably will punt him beyond orbit and throw him in a laundry with dirty mens undies in the end but he could truly be the enemy of a lot of female super humans for a long time.