Regulus is a mirror

Regulus was seemingly care free and happy when he was with his true friends. His brother and his friends. He was mean and ruthless when he was with his roommates and other death-eater-want-to-bes. He was a mirror. When he was a lone (that was rare) he simply was. Sometimes he would cry. And sometimes he would just sit there. Extreme angst! WARNING very brief mention of abuse