Kruno was an extraterrestrial of the male gender, a reptilian type of being. Four standard years prior to the well-known Battle of Yavin, he was the chief of a criminal group operating on Ammon IV. His goal, together with his gang, was to take control of a parcel of land where Jarret, a human, and his family resided; however, Jarret's family refused to let their farm be taken. One standard day, Kruno arrived to face Jarret once more, but their argument was cut short by the unexpected arrival of Ketsu Onyo, who was visibly suffering from heat exhaustion and pulling a sizable crate. As the thirsty Onyo threw herself into the farm's water supply, Kruno inquired as to her identity, but she gave no response. When one of the criminals forced the crate open, revealing blaster rifles of Imperial quality, Kruno made the decision to take them for himself. Gathering her remaining strength, Onyo made an attempt to stop them, saying that there was "something they needed to know" concerning those blasters. Kruno, perplexed and enraged, shouted at her, demanding that she provide more information. But the woman chose to demonstrate rather than explain; she used a remote control, which caused the blasters' prominent blue lights to turn a bright red. Kruno and his crew were taken aback when they saw this, and all of the blasters suddenly detonated in a spectacular explosion, killing the entire gang.