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At the end of the opera "Antigone," both Antigone and Haemon meet tragic ends. Antigone, who has been sentenced to death by Creon for burying her brother, hangs herself in the cave where she is trapped. Upon hearing this news, Haemon, Creon's son and Antigone's fiancé, is devastated and kills himself. This information is supported by various sources, including Wikipedia, StageAgent, and SparkNotes. The image below depicts a scene from the opera, illustrating the emotional intensity of the characters' fates: