Orianna's Lore and Design

So on her lore she gave away her human heart and gave it to her father so he could live and so could the girl once known as Orianna. The Winding Key on her back is supposed to keep her human heart alive. But she gave away her heart to her father and used the Hextech-Crystal heart she made for herself. Shouldn't her in-game model not have a winding key on her back?