The Kingdom of Science's Counterattack To improve his drone, Senku decides to revive Kaseki first, but realizes guards are throwing all their friends' smashed statues into the ocean. This means they will first require Ryusui to dive and retrieve them. Ibara takes Ryusui to the citadel and begins smashing him to pieces, hoping to provoke enemy infiltrators to reveal themselves. Kohaku diverts suspicion by destroying Ryusui herself, knowing he can be revived as long as he is rebuilt first..