Sure thing. The following is a list of top 10 anime betrayals, a brief description of the situations and the names of the episodes:

- **Griffith sacrifices the Band of the Hawk (Berserk)**: In the Eclipse episode of the 1997 series, Griffith, driven to despair after being tortured for a year, activates the Behelit and sacrifices his loyal comrades, the Band of the Hawk, to the God Hand in order to become a demonic God himself. This betrayal leads to the horrific demise of most of the band members and marks a significant turning point in the series.

- **Itachi destroys his clan (Naruto)**: In season 3 episode 84, Sasuke finally confronts his brother Itachi, who massacred their entire clan when Sasuke was a child. Itachi reveals that he did it on orders from the Hidden Leaf Village’s elders, who feared a coup d’etat by the Uchiha clan. Itachi also claims that he spared Sasuke only to use him as a pawn for his own goals.

- **Light Yagami kills L (Death Note)**: In episode 25, Light Yagami, also known as Kira, orchestrates a plan that results in the death of L, the world's greatest detective and his main adversary throughout the series. Despite their adversarial relationship, L and Light have a complex friendship, making the betrayal deeply personal.

- **Reiner and Bertholdt are Titans all along (Attack on Titan)**: In season 2 episode 6, Reiner and Bertholdt reveal to their comrades that they have been Titans all along, and that they are responsible for the breach of Wall Maria and the death of many people. Their betrayal is a huge shock to the Survey Corps, especially to Eren who considered them as friends.

- **Yona watches her lover kill her father (Yona of the Dawn)**: In episode 1, Yona is a sheltered princess who is in love with her cousin Soo-won. On her sixteenth birthday, she goes to see her father, the king, only to witness Soo-won stabbing him to death. Soo-won then declares himself as the new king and orders his men to kill Yona and her bodyguard Hak.

- **Aizen's betrayal (Bleach)**: In episode 60, Sosuke Aizen, initially portrayed as a mild-mannered captain, reveals that he has been manipulating everyone in the Soul Society in his quest to obtain the Hogyoku. He betrays his fellow Shinigami and becomes the main antagonist of the series.

- **Kyubey tricks Madoka and her friends (Puella Magi Madoka Magica)**: Throughout the series, the seemingly cute creature Kyubey offers to grant any wish a girl desires in exchange for becoming a magical girl tasked with fighting witches. However, it is revealed that Kyubey has been intentionally withholding the horrifying truth about the fate of magical girls, leading them into a cycle of despair and death.

- **Lelouch uses his Geass on Euphemia (Code Geass)**: In episode 22 of the first season, Lelouch, under his alter ego Zero, meets with Princess Euphemia to discuss a peaceful solution to the Britannian occupation of Japan. However, in a twist of fate, Lelouch's uncontrollable Geass power commands Euphemia to kill all the Japanese, leading her to instigate a massacre which Lelouch uses to rally the Japanese against Britannia.

- **Sailor Neptune and Uranus join Sailor Galaxia (Sailor Moon)**: In season 5 episode 194, Sailor Neptune and Uranus betray the other Sailor Guardians by joining forces with Sailor Galaxia, the main antagonist of the final arc. They even kill Sailor Saturn and Pluto in cold blood. However, it is later revealed that they only pretended to switch sides in order to get close to Galaxia and steal her Star Seed.

- **Grell kills Madame Red without a second thought (Black Butler)**: In season 1 episode 8, Ciel and Sebastian discover that Madame Red, Ciel’s aunt, and Grell, her butler, are the culprits behind the Jack the Ripper murders. Madame Red hesitates to kill Ciel, but Grell shows no mercy and slits her throat in front of them, revealing himself as a Grim Reaper and a sadistic killer.

It should be noted that this list is subjective and may change from person to person depending on their personal preferrences.
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