My god in heaven, the anime explains everything I've been talking about for years, I made a post saying exactly what happened, KAIDO was not afraid of ODEN, the hostages were something that was already in the castle and not something planned by orochi and kaido, when KAIDO went to the castle, he was willing to risk a war against the whole country, and the decision was whether ODEN accepted or not, although KAIDO went to the castle at a disadvantage, he had about 200 men, kaido thought ODEN was a crazy that he didn't care about losses, and would accept the fight, and ignore the hostages that OROCHI made as an offering, but KAIDO realized that ODEN changed, WB and Roger were just like him, powerful, but with a certain softness. If ODEN chose to join his forces with the legendary HYOGORO, KAIDO would have to face the entire country of WANO with 200 men, and even then, KAIDO would decide to fight this battle classified as difficult for him.