7: "Seven of Nine" from Star Trek: Voyager, played by Jeri Ryan
Two numbers for the price of one! A reformed Borg, who is relearning how to be human again. And before anyone replyguys me to tell me her name is actually Annika Hansen, I know. Do not quote the deep lore at me, I was there when it was created. Pretty much nobody calls her anything other than "Seven" in casual conversation, until we meet her character again in Star Trek: Picard.