Lightning

Sage Meryln is the younger sister to Tommy. She's best friends with Thea. They don't do things without one another. She's there for Thea when her dad and brother die. But then years later they find out Oliver is alive. And everything changes. A vigilante is in Star City. And Sage finds out the truth. Moira Queen and Malcolm Meryln had an affair. Which leads to Moira getting pregnant. And then Thea and Sage were born. Thea and Sage are twin sisters.