Full Metal Panic!
Her Problem (3x9)
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Kaname confronts the Mithril operative sent to replace Sousuke; however, as she is about to get answers, she is attacked by an Amalgam assassin. Kaname outwits her pursuer until Leonard Testarossa, another Amalgam agent, shows up and kills her assassin. He reveals that the assassin was a rogue agent acting outside of Amalgam's interests.