(literary criticism voice) Steven, his mother and Lion have close parallels in Christianity and the doctrine of the trinity: the powerful, transcendent parent, the compassionate son incarnate and the mysterious, spiritual imparter of wisdom, taking the form of an animal. This is enforced by the choice of name - 'Steven' - St Steven of course being the first Christian martyr, emphasising the sacrificial aspects of our hero's -
*remembers that Rebecca's little brother is called Steven*
All I ever wanted to do was go to Hogwarts and have a mate to get up to mayhem with. Just like Harry Potter. And I got his son. How crazily fortunate is that… you’re my best friend, Albus. And this is mayhem to the nth degree.