1: "Roy Mustang's betrayal of his best friend Maes Hughes left fans heartbroken."

2: "Scar's surprising change of heart towards the end shocked viewers."

3: "Lust's betrayal of her fellow homunculi for her own gain was unexpected."

4: "Kimblee's betrayal of his allies in favor of chaos was truly shocking."

5: "Envy's true identity as a Homunculus and betrayal of the Elric brothers was a major twist."

6: "Greed's eventual betrayal of the homunculi for his own desires left fans speechless."

7: "Hohenheim's dark past and betrayal of his children added a new layer to the story."

8: "Father's ultimate betrayal of his creations and quest for power was a jaw-dropping moment."

9: "The series is full of shocking betrayals that keep viewers on the edge of their seats."