Atene Tennōsu, often referred to as Athena or by her childlike nickname A-tan, is a character who appears in the fourth anime season Hayate the Combat Butler! Cuties. Her background is deeply intertwined with the protagonist Hayate Ayasaki's past. She was his first love and former employer from ten years prior to the events of the series. During that time, she taught him essential skills such as swordsmanship and cleaning, and she gave him a ring that his parents later pawned, which led to a falling out between them.

In Hayate the Combat Butler! Cuties, Athena appears not in her adult form but as a smaller, childlike persona named Alice. She lives with Hinagiku Katsura and has lost her memories of her past relationship with Hayate, including her adult identity. Her personality in this form retains a sense of authority and a tsundere-like demeanor, often ordering Hayate around and interacting with Nagi Sanzenin in a manner reminiscent of a rival. Despite her small stature and lost memories, she is highly intelligent and displays moments of exceptional competence.

Athena's primary motivation in Cuties is to return to her full size, power, and memories. This process involves the Violet Mansion and Shirosakura, though it is depicted as progressing extremely slowly. She spends much of her time sleeping longer periods than usual and has a very small social circle, with her closest companion being her large, talking dog named Armageddon. Her role in the story is to highlight her current state of vulnerability and her place within the new living arrangements at the Violet Mansion, where she has become a tenant. Her episode in Cuties focuses on enhancing her relationship with her dog and uses chapters from the manga that depict her life after the major events involving the King's Jewel.

Key relationships for Athena include her complex history with Hayate, which the anime in this season deliberately avoids addressing directly. She also has a significant relationship with Nagi, as the two blond, tsundere characters often interact. She lives with Hinagiku Katsura, who acts as a guardian figure, though meaningful development of their "mother and daughter" dynamic has yet to be explored in depth at this point in the story. Her development in this season is static, focusing on her current state of recovering her memories and power, with her actions often driven by loneliness and a desire to regain what she has lost. Notable abilities shown include her sharp intelligence, which she uses to help locate missing funds, and her command over Armageddon, who acts as a powerful and loyal guardian.