Sirius's mother. Though she's been dead for twelve years at the start of the novel, she appears in her portrait in number twelve, Grimmauld Place. Her portrait isn't entirely sentient, but it screams obscenities about Mudbloods and half-breeds whenever someone rings the doorbell or makes too much noise. In life, she was obsessed with blood purity, and on the Black family tree, she burned off the names of family members who offended her by not buying into the same ideology.
Mrs. Black Character Timeline in Harry Potter and the Order of the Phoenix
The timeline below shows where the character Mrs. Black appears in Harry Potter and the Order of the Phoenix. The colored dots and icons indicate which themes are associated with that appearance.
...if he wanted to. Someone rings the doorbell downstairs and Sirius runs down to stop Mrs. Black 's screams (she’s awakened by the sound). Harry takes as much time as possible closing... (full context)
...stop buzzing with doxies, someone rings the doorbell. Mrs. Weasley runs downstairs to deal with Mrs. Black as the children look outside and see Mundungus with a stack of cauldrons. They figure... (full context)