Koro have been serving aboard the Naboo Grassland since 241 ABY. In 247 ABY, when he was helping his friend Haldo to stop the flooding of a service corridor, the Sakrask pirates made a raid against the ship, with the aim of capturing it whit its load. Koro defended the ship together with Haldo and they managed to reach the command bridge, killing most of the Trandoshan pirates. Suddenly, just in front of the bridge doors, other pirates arrived and so Haldo allowed Koro to go into the bridge while he sacrificed himself stopping the enemies.