Amarello Berge fulfills the role of the yellow Sword Eyes of Darkness among Atlantia's forces. Her father's affiliation with the Red Army led to her receiving directives to protect Grenada, a purpose that fundamentally shaped her motivations and loyalties throughout her story.

In combat, she wields a distinctive whip that complements her assertive demeanor, demonstrating notable proficiency when engaging multiple opponents simultaneously. As the sole female member of the Sword Eyes of Darkness, her presence contributes diversity to the group's composition.

Her narrative incorporates a romantic subplot with Galaxy Watanabe, formerly a Messenger of God. Their relationship initially encountered obstacles due to Galaxy's non-aging nature, creating a temporal disparity. This dynamic shifted when Galaxy lost his powers and transitioned to mortal existence, ultimately culminating in their marriage as confirmed in the series epilogue.

Amarello's design features pink hair, yellow eyes, fingerless gloves, and a coat. Her name phonetically echoes "amarillo," the Spanish word for yellow, aligning with her designation as the yellow Sword Eyes of Darkness.