Heather's not exactly sure how she got here, but at least the role of 'older sister' is a familiar one.

When Harry Potter looked back on his childhood as an adult, he would be vastly amused that life's most important lessons had been taught to him by animals instead of his human kin. How to laugh in the rain, how to cry under the bright sun, how to say goodbye to dear friends when their time came- he learned them all from his first friends. (Animal!Whisperer Harry)

Blood Magic isn't Dark or Light- it's balanced. Unfortunately even the best intentioned wise-men can make mistakes. In Harry Potter's case it means being hurled through time into a new body and growing up in a time of war just after his own ended. Of course, balance means that he doesn't remember anything- at least not at first- so maybe this is more of a blessing than a curse?

In which Dudley needs glasses, Petunia gets pregnant, Vernon has a competent HR manager, and Harry's world is forever changed.