Emporer and his prime minister. But when he was in power the crazy awful you can't trust anyone paranoia kicked in and I think the emporer let the prime minister be killed... or maybe the pm sacrificed himself... I forget exactly. But the prime minister was his most trusted companion b4. The pm was the underworld shinegami that help the 1/2 ghost child... the shinegami pm accomplished what he needed to return or remove his or maybe the emporer name from some underworld list... and then he reinterred the cycle of reencarnation... I wasn't paying as much attention and I should have at the time. So much was happening. But now they found eachother again