So this is basically just where I think the characters of skin would fit into the Hogwarts houses.
Michelle would be in Ravenclaw because of her wit.
Tony would be in Gryffindor because he's brave when looking at for his sister and after he gets hit by a bus he tries his best to recover.
Sid would be in Hufflepuff because he's pretty lazy and doesn't seem to fit in the other houses.
Jal would be in Gryffindor because she has been the most brave character throughout the series and especially after she gets pregnant.
Cassie would be in Gryffindor because she sees the best in people and is always very loyal to her friends.
Maxxie would be in Ravenclaw because he's very calm and intelligent.
Anwar would be in Hufflepuff because he seems to be wandering around, and cares more about girls than most of his friends.
Chris would be in Gryffindor because he has been brave his whole life since his brother died and his parents abandoned him.
Effy would be in Slytherin because she's very cunning and knows how to manipulate people.
If you don't agree with my choices that is totally fine because this is all my opinion.