When Caesar was ten, his Hamon-using father Mario left him without a word to fight the Pillar Men. When Caesar was 16, he encountered his father in Rome and came across the wall containing the Pillar Men that was rigged with a trap. Mario, failing to recognize his son, died saving Caesar. In his last moments, Mario instructed Caesar to speak to Lisa Lisa, which Mario believed was the only person who could stop the Pillar Men. Caesar then sought to avenge his family. In 1939, Caesar and Messina arrive at the hotel and Caesar is attacked outside by Wamuu who refracts the sunlight around himself with wind. Wamuu wounds Messina and drags him into the hotel, prompting Caesar to go in after him. Using his new Bubble Cutter attack and a series of refractive bubble lenses, Caesar wounds Wamuu and redirects the sunlight inside the hotel to pin him down. However, when Caesar's shadow covers the sunlight, Wamuu critically wounds him with Divine Sandstorm. Caesar uses the last of his strength to steal Wamuu's piercing into a blood bubble before being crushed by the collapsing ceiling. Wamuu, respecting Caesar's resolve, allows the bubble to remain for Joseph.