"What?" said Harry and McGonagall at the same time.
"You have a sister, Harry, as I believe I have just told you." Dumbledore's portrait said looking calmly at the two of them.
"Albus has being a portrait affected the way you think and perceive things?" McGonagall asked aghast, rather surprised that this was only being told to her now.
"Well actually now that you mention it I have been able to see Hogwarts through many different perspectives it's quite enjoyable. But it has not changed the way I think Minerva, you as well as Harry, know that before I was… ahem… released from living, for lack of a better term, I made mistakes; many of which where poor decisions on my behalf."
"Like your decision to trust Snape?" Harry asked before he could help himself, his anger was growing, Dumbledore bowed his head.
"Yes, a decision such as that, was one of them also withholding from you the true reason why Voldermort wished to kill you. I do realize that I should have told you sooner but of course it slipped my mind, although as a matter a fact I did plan on telling you at the end of last year but due to the circumstances under which I was unable to pass on that information to you I see now that I should have informed you earlier on. Perhaps I should have told you at the end of your fifth year or during one of the private lessons you had with me last year." He looked off into space twiddling his thumbs, "I know you are curious feel free to ask what you like." Dumbledore said addressing them both.
"What's her name?" McGonagall asked.
"Crystal, she is exactly eleven months, three weeks, and three days older then you, Harry." Dumbledore said.
"So," said Harry after a long pause, "so she would be 18? Dumbledore's portrait nodded.
"yes, she was born in June and quite obviously your self eleven months after her in July." Dumbledore said.
"Wh-what does she look like?" Harry asked his curiosity growing.
"Well actually she looks like your mother. She has, and unless I am mistaken, red hair, green eyes, and a knack for getting into trouble, much like the knack your father had." Dumbledore added chuckling. "She's quite brilliant though," he added fondly, "I got the privilege to teach her transfiguration," McGonagall looked at him aghast, "she has mastered things, that took me years to master, in a matter of a few short hours. And her magical skill is most remarkable."
"What'd you mean?" Harry asked.
"She's very talented, excellent in transfiguration and potions as well as defense against the dark arts." Dumbledore's painted eyes lit up.
"so she didn't go here did she? She didn't go to Hogwarts?" Harry asked.
"No," Dumbledore said most defiantly. "she studied magic at another school called Hawthorn's school for advanced magical practitioners."
"So was she top of her class?" Harry asked.
Dumbledore smiled and nodded.
"I believe she was a head girl by the time she left school, I corresponded with her many times. And as I've said before I do feel sorry for not telling you of her before. I sincerely wish I had." He looked off into space his blue eyes glistening.
"Was she top of her year?" McGonagall asked after being silent for ages.
Dumbledore nodded, "she was and Minerva if you don't mind me making a suggestion…" Dumbledore trailed off his eyebrows raised as if wanting to be asked to continue.
"Of course Albus your opinion is always highly viewed." She said her mouth starting to thin.
"Well if I may I recall when Armando Dippit was headmaster," Armando inclined his head at the sound of his name, "he was forced to give up the subject that he taught which I believe was charms, correct Armando?" he nodded, "and that was with me as well, you recall I asked you to teach here because I was being made headmaster and there are a great deal more of things for you to do then when you are the deputy head."
"What are you suggesting Albus?" McGonagall asked.
"well I believe that I am suggesting that you invite Crystal to Hogwarts and offer her to become the Transfiguration teacher." McGonagall stared at Dumbledore incrediously, Harry could see that Dumbledore was trying hard to keep a straight face.
"My dear Minerva I am merely kidding, I believe Crystal already has a job, she has just recently come to London." He said, "She is an Auror, now currently in employ at the ministry of magic."
"I heard they had gotten a new auror," Harry mumbled, "I think I read it in the daily prophet, either that or Hermione told me sometime during the summer."
"yes, I do suppose that you would be correct in that aspect, oh and Minerva I had the liberty of getting Hagrid to write her a letter, inviting her to Hogwarts." McGonagall looked as though she was going to yell at Dumbledore but he, either appeared not to notice or decided to ignore the fact that she was glaring at him.
"Albus you can't just-" she started to say
"Oh I'm aware I cannot but I have decided that yourself and Harry should meet her." There was a knock on the door. "and I believe that's her just now. If you would Harry could you open the door?" Harry nodded, pulled out his wand, and the door opened. A young woman stood in the doorway she had red hair and wore stunning crimson and gold robes, gryffindor colors.
"Sorry am I interrupting?" she asked