They did show one Seven of NIne episode do you remember Seven of Nine start go Bipolar she started getting these personality they show that episode first she was little girl then she went to Klington on Lt Commander Turkok the Vulcan dude
Going back to Q for momemt I don't know if you know this but John De Lanice the one play Q wasn't going make guest appearnace on Voyager but when he found out he was going work with kate Mulgrew long time homegirl of his
He jump the chance