Micah King m_king is a werewolf, beta to Fenrir's alpha. He chose to turn along with his brother (Isaac) after their sister (Delilah) was attacked nearly ten years ago. He's well educated, teaches the pups (and adults who want it) in the pack. He's also very moral and protective and is in a relationship with Delilah, which Isaac objects to loudly. Micah was adopted by their family after his own parents died when he was young. So while he and Del see nothing wrong with their relationship, Isaac strongly objects to it.
Augustus Rookwood douspart works for the department of mysteries. He's an older wizard who appears to have a charitable heart and is at the moment neutral in the war. Behind closed doors Gus and his wife, Ursula, actually hate the children they raise money for. Hate mixed breeds and mudbloods and basically cheer for Voldemort.
Amycus Carrow dark_carrow is very much a DE. Supports Voldemort's cause. Loves to torture and kill. Con man who manages to thrive by stealing the money from muggles and turning into wizarding currency.
Severus Snape alwaysthedoe is a double agent. Joined the DE to try and stay ahead of the game in hopes of protecting his best friend, Lily Evans. That backfired and a torture session with Voldemort ensued. He's been told to infiltrate the Order or Lily dies. He was very upfront with Dumbledore about this and is now working both sides of the war. And he's training to take over the potions professor position at Hogwarts (also living at Hogwarts now).
Peter Pettigrew wormstail marauder, Order member, and unregistered animagi. He's currently on the outs with his friends after coming into possession of a cursed locket (horcrux that no one knows about bc wtf is a horcrux?!). He is currently staying at the Leaky Cauldron with Kreacher. Being wooed by the DE, Castor Yaxley. And pretty much doesn't know what to do and feels like shit for being a dick to his friends while under the influence of dark magic.
And then there is Lana Hopkins lana_h she's so dead now, SORRY! But feel free to enjoy the rest of her death scene ;)