When you dedicate your life to your fandoms on Tumblr
Imagine Sirius had a daughter, who acted similar and looked exactly like him. She is the same age a Harry. Since she's Sirius's daughter, I imagine her to have a hard childhood. And didn't grow up with a family, similar to Tom Riddle. How do you think characters such as Remus, Harry, and Kretcher would react to her? Heck how do you think Sirius would react to her?