Transformers Prime: Heart of a Gladiator

Raf's sister, Monica, is home from college and she's meeting the Autobots for the first time. Turns out, her new car is an Autobot named Luna, who was once a famous gladiator on Cybertron. We learn that Luna has a twin sister, and they both trained under Megatron himself. But in times of war, sides were chosen, and the sister's drifted apart. Jack/OC Wheeljack/OC Smokescreen/OC