She has never actually been shown on the show, and therefore served as a running gag (as the unseen character is a popular literature device). On The Click on the-n.com (which is now redirected to teennick.com), there is a Degrassi Mini titled "Be Aware of Heather Sinclair" in which Heather is still never seen, but we are shown the other characters' reactions to her mean comments instead. It is implied that she graduated in 2006 according to the occurring events in her Degrassi Mini. She is the older adoptive sister of Holly J. Sinclair and the daughter of Mary-Kate Sinclair.