(A/N: This chapter made me tear up while writing it. I hope you all like it as much as I do. Read on, Darlings, and you'll see why!)
Harry looked up as soon as the world stopped spinning. He tapped his right foot to see if the floor was carpeted and he heard the tiny slap of his shoe hitting stone. Not carpeted, then.
McGonagall looked at him and cleared her throat to catch his attention.
McGonagall: The department we need is this way, to the right. Let's not dally.
Harry nodded and trailed a few feet behind her as she walked further down the hall. They stopped at a door about 200 steps from where they had started and Professor McGonagall knocked on the door.
Unknown: Come in.
McGonagall led the way inside and shut the door behind Harry as he followed her in.
McGonagall: Scarlett Redwood. It's been a while, hasn't it?
Scarlett: It has, Professor. You look as stern as ever. How are you?
McGonagall: Very well, thank you. I see you've achieved your goal of working at the Ministry. Do you enjoy your work here?
Scarlett: I do, thank you. You probably didn't come here to talk, so what can I do for you?
McGonagall: I have an animagus student that needs to be registered.
Scarlett: Of course. I'll grab the papers and we can head to the chamber to transform.
Harry: Do you have an animagus form too?
Scarlett: I do. I turn into a red squirrel. It's kind of small but I love it either way. Alright, let's go into the back room and you can transform. By the way, I love your snakeskin scarf. Is it real?
Harry (Smiling): He's very real and very alive.
Scarlett paused and turned around to stare at him in shock.
Scarlett: It's alive? How do you trust it to not strangle you?
Harry smiled at her and stroked Castor's scales, looking at him fondly.
Harry: My familiar wouldn't hurt me. Besides, he's my eyes.
Scarlett: Your eyes? How so?
Harry: I'm blind. Castor sees for me and tells me where to go.
Scarlett: Oh, I didn't realize. Your eyes, they look so normal.
Harry: It's okay. I know they don't look the same as others but I am 100% blind.
McGonagall: That's not exactly true, though is it? I saw how you knew exactly where to go when Terry Boot had that anxiety attack. Explain that to me.
Harry: My Veela ability allows me to see magical auras. The castle stones are all filled with magic that I can see, meaning I can see a black and gray version of the world but with lines for color rather than just black and gray lines.
Scarlett: Interesting. I wonder how your animagus form will handle that. Or change it, I suppose.
McGonagall: I guess we shall find out.
Scarlett: Indeed. Come, this way.
She led them through a door behind her desk and into a medium-sized room, a little bit bigger than her office, Harry thinks. She set the papers on a tiny table off to the side of the door and gestured for Harry to go to the center of the room.
Scarlett: Have you transformed yet? Before now, I mean.
Harry: No.
Scarlett: That's fine. The most important thing to do is think of what your animal might be.
Harry: How will I know what it is?
Scarlett: You'll see a color image of the exact animal you'll be. Fur, scales, feathers, eyes, and body will be completely yours.
Harry hummed and closed his eyes, clearing his thoughts of anything but what he might be. At first, he saw nothing, but then bright, almond-shaped, green eyes appeared in his mind. Soon after, a feline body was outlined, with thick, black, and auburn fur and tufted ears and tail. Next, he saw his identification mark.
It wasn't really a mark, so much as an actual necklace or collar. The chain had thick links and a medium-sized pendant with a green Catseye gemstone inlaid in the same metal as the chain. Engraved in the catseye was a lightning pattern, not unlike the scar on Harry's forehead.
Harry: I have it.
Scarlett: Good. Now hold that image in your head. This time imagine your body turning into your animal one.
McGonagall: Hold it until you know for sure you are done transforming.
Harry nodded and closed his eyes again so he could concentrate. He felt a tingling sensation all over his body and he felt like he was shrinking. All of the while, Castor was slithering off him and curling up nearby, eyes focused with attention.
Minerva smiled as Harry's transformation came to a close. His transformation was quick and easy-going, which she was proud of him for, but that was not the important part. The important part was that HE WAS A CAT LIKE HER! Now her animagus could have an actual playmate.
Feeling that the change was complete, Harry shook himself and opened his eyes, earning a small gasp from Scarlett.
Scarlett: Oh, your eyes are stunning! They're even brighter than when you are human!
Harry didn't make a sound and he stood frozen, as if in fear.
McGonagall: Harry, is everything alright?
Still, not a peep from the cat. This time, Castor, as McGonagall assumed, slithered over to Harry, wrapped around a front leg, and draped over his back. He hissed and rubbed his head against Harry's furry cheek, hissing again. This time, Harry gave the tiniest "meow" and McGonagall noticed the wet feline tears leaking from Harry's eyes. Her brain finally made the connection and she nearly sobbed as tears came from her eyes too.
Even in her clean robes, McGonagall kneeled down on the floor about fifteen feet from Harry.
McGonagall: Harry, honey, can you see me?
Scarlett's eyes glistened as she watched the exchange. Harry gave a meow and took a questioning step forward.
McGonagall: That' wonderful, honey. I'm going to change into my cat so you can get to know her, alright?
Another meow, and she took it as being okay. She stood up and turned into her cat, a brown Tabby with the outline of white speckles in the shape of her spectacles as her identification mark.
Castor slithered off of Harry and over to Scarlett who reached down to pick him up. She was careful not to squeeze him tightly and she kept him facing the two cats so he could watch them. For that, he was grateful.
Minerva approached little by little and sat down. Instead of going to Harry, she'd let him take the lead and come to her. She didn't want to make him uncomfortable so this was the best way.
(A/N: The picture below is what I imagine Harry looks like in his Animagus form. This exact fur and eye color but more kitten size.)
(A/N: And this is how I imagine Professor McGonagall.)