You were the Curtis brother's sister, except you died at the age of 16 to being shot my a Soc. Here's the explanation. You, Ponyboy (14), Sodapop (`16), and Darry (20) were hanging out in the lot with Shepherd and his gang. However, things went horribly wrong. Soc's surrounded the house and broke in. The soc's had guns and were going to shoot your 3 brothers, except, you got in the way and that resulted in your death. When you went to heaven, you met God and Satan, they decided to make you become a goddess, or in this case, a Goddess Of Death And Creation.
You watch over your brother from heaven and watch them grow. Eventually, it was the day of the rumble and you saw The Greasers and Soc's in the lot, about to fight. There, you saw your 3 brothers, Ponyboy Curtis, Sodapop Curtis, and Darry Curtis, along with their 4 friends, Dallas Winston, Steve Randle, Two-Bit Matthews, and Johnny Cade. While you watched the fight, you saw a Soc trying to sneak up on Ponyboy with a blade. Your eyes widened and you immediately teleported in front of Ponyboy, blocking the blade from hitting him. You were already dead, you were now immortal.