In the wake of the Battle of Yavin, Leia Organa, a childhood friend of the brothers, traveled to the moon in hopes of convincing the brothers to let the Rebel Alliance use it as their new base. Raal didn't care for the Rebellion much, though he did care for Leia, and proposed that she stay on the moon with him and together they could preserve a bit of Alderaan together.
When Raal took Leia on a tour through the wild preserve, they failed to return. Heeth sought them out—and eventually found Raal dead, bitten by a morp. Enraged, he refused to help the Rebel Alliance and ordered Leia to leave the moon. And after that, their relationship ended.
- The Complete Star Wars Encyclopedia