Blonde, because there's nothing more on common between them:-Lusamine is a loon obssesed with power, Ultra Beasts, and a terrible Mother that negectled her children-Rosalina is a sweet and noble guardian of Cosmos that take care of the Lumas with motherly love.-Cynthia is a serious yet flamboyant champion that gained a reputation for her own; However it's heavily overrated about how Though she is because, at least in the original Diamond and Pearl version, you only needed to use a SINGLE Pokémon