Mcgonagall watches closely as black scales begin to appear on Reima's face, she's intrigued by what animal his Animagus transformation might be but doesn't press him on it as it's a rather personal subject.
Reima's face is slowly covered by scales which continue to travel down his neck and presumably his chest, abdomen and legs. Mcgonagall observes this closely as literally anything is possible at this point, she'd even seen someone's skin invert, leaving their organs on the outside during a transformation... Obviously they died a painful and agonising death, not because she couldn't reverse the transformation but because he was terribly infected by all sorts of things before they could return him to normal. That incident alone made her wary of anyone attempting to transform alone, of course there were others. Turning into a centaur is one, half spider half human hybrid that researchers fondly named "SpiderMan", though what happened after the Unforgivables took him is anyone's guess.
Eventually she decides to put a stop to his transformation for now as doing so too hastily could end in disaster, he prods Reima with her wand which slowly draws his eyes open as the scales fade away back under his skin.
Reima rubs his forehead as a strange feeling overtakes him and asks "What happened?"
Mcgonagall smiles at him, "You are close to transforming, did you feel your body changing?"
Reima nods, "My skin was tingling but I thought that was something else..."
Mcgonagall shakes her head, "You did very well, a couple more sessions and you'll be able to transform completely" she says with a hint of excitement.
Reima nods and glances at Ciri who's still deep in meditation, "I'll continue until the next classes start." he says, receiving a nod from Mcgonagall.
Elsewhere :
Ron Weasley was having an awful day, first he gets rejected in-front of the whole school then he finds out that Harry's freak friend is going to the ball with Ciri and Fleur? If that wasn't enough he was forced to dance with Mcgonagall for a full hour! After the dancing class had ended he'd retreated up to his dorms while skipping his lessons. Once in his room he looks around his messy trunk in search of something. All of his personal affects are strewn about the place haphazardly which makes finding anything incredibly difficult but he eventually finds the package he was looking for.
It's the package his mother had sent to him a few days ago after telling her his troubles with Harry and Hermione. He'd never admit that it was his fault that they had cut relations with him but his mother would never know that. He tears apart the package as if it were Christmas but stops when he sees the contents... A vial? Some kind of potion? He pops the cork and takes a whiff before frowning when he finds that it smells like old books... Did his mum send him the wrong thing? He notices among the torn apart remains of the package a note that he'd inadvertently ripped in half, piecing it together he sees what's written : "Ron, I've heard your worries over your relationship between Harry and more importantly Hermione so I've placed a potion that'll fix your problem immediately. All you have to do is place it in her drink or food and your problems will be fixed. Love Mum."
Ron nods to himself after he's finished reading it, trust his mum to finding a solution to his problems... However instead of trying to fix his relationship with Hermione, maybe he should get some revenge on that freak instead? After all he's already got two dates, why shouldn't he get one? While the classes continue he starts to think up ways of slipping whatever this potion is into the drink of Fleur or Ciri, he'd have to go for the easier out of the two so he'll try for Ciri... However, without Hermiones intellect or Harry's bravery, Ron's plans are all either incredibly stupid or impossible.
The next day at breakfast Ron is stirring in his seat, he'd already eaten his own weight in food but was constantly looking for a chance to stick the potion into Ciri's drink. He was lucky no-one noticed he'd taken a seat much closer to Harry's group than he usually would but still found it difficult to go forward with his plans.
Eventually he drums up his courage enough to attempt it, he gets up and acts as if he's heading for the toilets with the vial hidden in his palm. As he's passing Ciri he pretends to stumble and tries to slip the vial in her drink.
Reima is keeping a close eye on Ron during all of this and already knows he's got a potion in his hand, he's about to intervene when someone else does.
Ron's hand is slapped away by a furry black paw courtesy of Snuffles, but that isn't all. Ron is immediately tackled to the floor by around 10 grey skinned midgets, or better known as House Elves.
"YOU WILL NOT HARM MISTRESS!" they all screech in horror while attacking him, giving him weak punches and kicks while occasionally throwing cutlary at him.
Ron screams in panic as he's assaulted by many tiny hands, the whole rooms focus is on him as he flails around while Bug Eyed creatures try to attack him. Eventually Dumbledores seen enough and shouts, "STOP!" causing the hall to fall silent and the house elves to stop.
Dumbledore "What is the meaning of this!" he says calmly but loudly.
Idk about you guys but I can't think of a more humiliating way to have your plan foiled : by getting attacked by a group of teleporting crazy midgets...
As always, if I missed anything please let me know.