is what Slytherins who think they're cool are wearing to the Yule Ball nowadays

Gryffindor!

No student is present, is Voldemort pretending to be a student to get closer to killing that Potter child once and for all.

Seriously, only a Gryffindor would attend class in this attire instead of the prescribed school uniform!

Slytherin.

Looks like a Ravenclaw interested in Muggle tech to me.

Hufflepuff!

Despite being surrounded by a garden she grew herself and her decidedly non-life-threatening familiar is not a Hufflepuff. Lovegood is a Lovegood, and genetics wins because in Harry Potter stories of course it does. Ravenclaw.

As I can see cake I must conclude this lost Hogwarts student is a Hufflepuff as that House has the easiest access to the kitchens.

Slytherin for sure. She's a lady who is incredibly brilliant and sly.

Ravenclaw

Merfolk from the loch are not allowed to be Hogwarts students, but is bribing a Gryffindor from a large and otherwise honorable yet very impoverished family to tutor her. Slytheriny for knowing how to get she wants, or Gryffindorish to brave the wrath of the racist wizard kind, of Britain by learning magic anyways. We will not know for sure because a sorting hat as ancient as the one Hogwarts has will not survive being wet.

Slytherin

umm hufflepuff or ravenclaw

So many students and porpoise sorry have fallen for that cute innocent-seeming face for so long it's almost been forgotten that is a Slytherin of the worst kind.

I think you are something from the Department of Mysteries. :p

Perhaps Hufflepuff, if I had to pick.

Ravenclaw

Very misleading. Slytherin. No doubt.

Ravenclaw

Slytherin