Sign:
Gemini

Blood Type:
A

Secre Swallowtail was the servant of Lumiere Silvamillion Clover, crown prince of the Clover Kingdom and the 1st Wizard King. She became an anti-bird upon sealing Lumiere into a statue.
Five centuries later, she decides to stay alongside Asta after encountering him at the beginning of the Magic Knights Entrance Exam and became the Black Bulls new pet, Nero, guiding the squad through multiple obstacles they face on their journey. After regaining her human form, she becomes an official member of the Black Bulls.