The other woman closeish to the two of them is merely ordinary levels of pretty, and either has the self-confidence to stand next to those two and not wilt or is very very good at faking it. 

Not close enough to those three to be obviously connected is a woman with grey skin and pointed ears a different shape from the first unfairly beautiful man's. She occasionally surveys the obviously-male inhabitants of the room with resignation. 

And then there's this ordinary-looking boy with rumpled clothes and messy black hair, cheerful and slightly distracted, whose gaze keeps returning to the grey woman with a thoughtful, curious air.

Off to one side, a man with long blond hair in a button-down shirt and slacks has his arms folded, looking supremely bored. 

Several yards behind him and a bit to one side, an eerily pale man fingers some kind of bandolier-like thing across his chest with handles sticking out, face guarded. 

Clear across the room from the first half-woman-half-giant-spider, there is a second half-woman-half-giant-spider, pointedly not looking at the first one.

And lastly there is an attractive young man—he's probably used to being the prettiest person in the room, when it's a less carefully selected room—wearing an elaborate robe and a slightly excessive amount of jewelry, including a magnificent black opal ring. His face and posture display a carefully cultivated aloofness that probably took him hours in front of a mirror to perfect.

Okay. 

Deep breaths. 

She walks into the room and takes a position sort of at the back, not because she's trying to be at the back, but just because she doesn't see much reason to keep walking once she's reached the general area people are standing. Definitely. 

The shadowy apparition pauses in its slow pacing, turns its head in her direction, and makes a soft hissing noise like fine sand flowing down a slope.

And in a flash of light, a woman appears. 

What she looks like is different to each member of the class, but she's drop-dead gorgeous. If you have ever in your life had a sexy domme fantasy, this is it. 

(She smells perfect.)

(She's grinning widely, a pure joy evident on her face that some spend lifetimes striving for.)

(She looks so safe.) 

"May I have your attention please!" 

Yes. Yes she can. 

Anzu, having already been exposed to this display, is able to turn her head aside with some difficulty. 

Oh goodness. 

Oh.

...wow.

The girl in the lace gloves doesn't look up. She might very well be the only one who doesn't.

(She's listening, though.)

"Thank you." She clasps her hands, still beaming. "While I have many names, the one that all of you shall know me by for the following year is Mesmerra--Dean Mesmerra, for I am the founder, administrator and absolute ruler of this school." Pause for effect. "I am a goddess of mind control. That's not bragging! I am not merely deific in skill, but a literal deity who draws power from every instance of mind control in every single world I touch. And the number of those is always growing." She tosses her hair a little, not quite smug, merely supernally self-assured. 

"Welcome to Mind Control University. Ours is an intensive program, and by the end of the year every single one of you will have the power to bring nations to heel with nothing but your own will and a box of scraps. Of course, this is a competitive program as well, in more ways than one--some of you will no doubt be Emperors and Empresses in your own right before the year is out, while others...may be pets, or toys, to the others. Remember," she winks, "do unto others before they do unto you! But there are, of course, limits," she says, turning serious. "Rule number one is that you are not permitted to sabotage your classmates' studies, be they your rivals or pets. Subtlety is key--you are here to learn cunning and finesse almost as much as raw power. An attempt to enslave one of your classmates discovered before the attempt is complete will result in your would-be pet being freed and a penalty laid on you, and no, I won't tell you what it is. There are so many possibilities, and even I don't know beforehand which one is going to be most appropriate." Pause. Headtilt. "Also, the library, classrooms, and cafeteria food are absolutely off-limits. Attempting to enslave one of your teachers isn't against the rules, and in fact will result in instant graduation magna cum laude if successful, but you will not be successful, and will no longer be off-limits to them. Don't do it." 

She smirks. "Any questions?" 

Nothing for a moment, and then,

"What are the rules about enslaving people other than students or teachers?"

"Excellent question. Surrounding the campus is a 'town' of sorts comprised of neighborhoods transplanted from each of your worlds. The only rule in how you treat the townies is that you are not permitted to bring them on-campus without special dispensation. None of them are as powerful as a teacher, but aside from that, I'll let you figure out the risks involved for yourselves. It'll be an adventure." 

"This is a university, right? Is there tutoring available for those with, uh, no prior formal education?" 

"Your teachers are aware that this class has been drawn from worlds with widely disparate levels of technology, culture, and educational standards, and their classes are calibrated accordingly. However, if you want to fill in existing gaps in your knowledge, the library contains an excellent selection of volumes on all topics--not just mind control--from every universe here represented and many more besides." 

"Are students who arguably possess multiple identities counted per-body or per-identity?" asks the cheerful girl from earlier, now totally lacking any emotional affect whatsoever. 

"That's a question that varies by student and by class, but as it happens, every student in the current class is counted per-body." 

The thoughtful boy hesitates a little longer before asking, "So when you say we're in trouble if we get caught enslaving people before we're done—what counts as enslaved enough? And will we still get in trouble for doing stuff to people if we're not trying to enslave them? Or if they agree to it?"