Miriam Mendelson from turning red is umbert the unborn. There are other characters from umbert the unborn like Elwood, for example vita the viable doby and Toby the twins. What Miriam the umbert the unborn theory was a theory about Miriam being umbert the unborn as Miriam Mendelson from turning red the theory goes

In the Miriam the Umbert the Unborn theory, Miriam Mendelson, along with her best friends Mei, Priya, Abby, and Tyler, embarks on a unique journey. Miriam possesses the extraordinary ability to communicate from birth, connecting her with characters from the pro-life comic strip "Umbert the Unborn."

Miriam was born in Scranton Pennsylvania not toronto she moved to toronto shortly after miriam’s mom died when she was six months old due a postpartum illness. His dad remarried when Miriam was three as a flower girl his father was a catholic on his biological parents side Jewish on her stepmoms side

Miriam lives with her dad her younger step brother

Aaron baby stepbrother Moses and even her stepmom Isabel.

As Miriam navigates adolescence, her besties play pivotal roles in supporting her. Abby formerly known doby , who has experienced the loss of a stillborn twin brother, and Vita, representing Priya, who was adopted by an Indian family, priya’s biological mother was not keeping priya she thought she was getting rid of her. But soon she heard that she is actually putting up for adoption. Elwood, standing in for Tyler, his parents were former physics professors at mit. who knows , as a former bully who undergoes a transformation Tyler formerly known as Elwood the expected declines intelligence at birth. Sometime later Tyler’s parents got rich due to a new business they created and even gain income from a deceased relative so soon after that Tyler and his family moved from Boston to toronto