"Yes." Regulus sighed quietly and turned his gaze to his cup again. "Shortly after Sirius left, I was in Hogsmeade, and I came across a cat being menaced by a much larger dog. I frightened off the dog, and the cat decided to follow me home, and I let it. I got... attached. I found it rather comforting to have a companion."
He looked up, smiling wryly. "The cat was very small, black, and blue-eyed. Does that sound familiar to you?"