Name: Scorpius Hyperion Malfoy
Age/Year: 17/6th
House: Slytherin
Blood: Pure
Family:
Father - Draco Malfoy
Mother - Astoria Greengrass
Brother - Alexander Malfoy
Appearance:

Personality: Varied. Mostly cruel and coldhearted and distant, but is easily swayed from that. He can be caring and nice and considerate, but only if the person has broken through his barriers or he really likes them. He is capable of loving, unlike many in her family before him, though he rarely shows it. He's sometimes troublesome, but tries to keep it low key so he doesn't get caught too much.
Background/History: Brought up in Malfoy Manor, he learnt the rules of being a Malfoy. He was taught all Mudbloods and Weasleys were scum, but when he got to Hogwarts, he didn't believe that. His father, though in some debt to Potter, had taught him not to like the Potter family but he ignored him and soon developed a small crush on Lily that he still harbors.
Name: Carys Shayna Longbottom
Nickname(s): Rys, Cary, Shay
Age/Year: 17/6th
House: Hufflepuff
Blood: Pure
Family:
Father - Neville Longbottom
Mother - Hannah Abbott
Sister - Peyton Longbottom
Appearance:

Personality: Carys is calm and considerate, speaking up for her friends but remaining quiet most of the time. She's loyal and reliable, hence her Hufflepuff status, like her mother. She feels out of place, awkward, but also like she belongs when she's around friends and family.
Background/History: Brought up in the Longbottom family, Carys was lucky to escape without the clumsy gene her father seemed to possess. However, despite the reputation the longbottoms had, she proved to not continue Neville's clumsiness and problem with certain lessons. She was quiet and didn't make many friends, feeling out of place, but she certainly relaxed more when she hung around with her sister and family friends.
*I've got a question: wasn't Scorpius the same age as Rose? Rose went to Hogwarts, and Scorpius was there ready to get on the train, unless my memory's going bodge.