Character One is Rufus Scrimgeour, the future Minister of Magic (in canon) and is the Chief Inspector of the Auror Dept. He hasn't had to get hard or mean thanks to politics yet, but he is still very much a dark wizard catcher and fully understands just what loosing the war to Voldemort would mean. He is incognito, and recently suffered family tragedy after his son was killed by DE's and his wife took her own life over the grief. He's become a bit of a lush because of it, and his relationship with his teen daughter is poor. But he's loyal, a damn good auror and very much invested in making sure the younger staff members have someone watching their back. He comes to you with the BAMFtastic face of Nathan Fillion.
Character Two is Amelia Bones, resident prosecutor for the Wizengamot council in the Department of Magical Law Enforcement. She's the eldest Bones child with two brothers below her- Edgar and Owen (Susan's dad). She's dating Benjy Fenwick (who is on the way!) and her biological clock is starting to tick at the worst time. She's serious, literal and incredibly blunt. She can be off putting because of her inability to soften blows and short patience with all things 'girly'. But she's smart, good at her job and currently not in the order. She comes with the face of Emily Deschanel.
And last, but not least, is Sirius Black. Sirius has just really entered his twenty something years and currently living in a bachelor pad near King's Cross. He's the same Sirius of the books, with the added affect that he's a bit mugglephobic and trying to hide that. He's struggling with losing his family over politics and being in the Order. He's working as an accountant, something that shocked friends and acquaintances a good deal- but he really just likes the math in money. He's moody and trying to grasp onto Hogwarts glory days still, but also trying to grow up and be a proper foot solider int he current political climate. Saying that he's scared of relationships doesn't even start to cover things. His face is Ben Barnes a la Easy Virtue/DG.