In the poem, Casabianca is portrayed as a courageous and obedient boy who remains loyal to his father, Admiral Casabianca, even in the face of danger. Despite the intense fighting and the destruction around him, Casabianca refuses to abandon his post and continues to fight alongside his father. He shows great bravery and fortitude in the face of adversity.
Ultimately, Casabianca is mortally wounded and dies a heroic death, earning the admiration of his fellow sailors and the respect of his enemies. The poem serves as a tribute to Casabianca's courage, self-sacrifice, and devotion to duty, making him an iconic figure of heroism and loyalty.