Rowan Blackmoor was in Slytherin House and wore the Relic Slytherin House Uniform, which you get for completing the Daedalian Keys quest from the game of Harry Potter: Hogwarts Legacy.
Rowan Blackmoor is crazy smart, charismatic, always calm, and does not mind getting his hands dirty, like killing his enemies. He can be kind to those he considers family and loved ones. Rowan Blackmoor is Caucasian, with dirty blonde hair, Hazel eyes, and has an Androgynous appearance that makes him look angelic. Rowan Blackmoor knows all the spells available in the game of Harry Potter: Hogwarts Legacy, even the unforgivable curse, like Avada Kedavra.
images of MC, Killer frost, and the MC family photo in the comments