Attribute Details
Japanese Name ネロ
Romaji Name Nero
Nicknames Red Saber, Saber Extra
Series Fate/Extra
Age Unknown
Weight Undisclosed
Height Undisclosed
Date of Birth Undisclosed
Blood Type Undisclosed

Nero of “Black Clover”: A mysterious anti-bird with hidden powers


Nero, also known as Kuro Nero, is a character from the popular anime and manga series “Black Clover”. Nero is an anti-bird who first appears as a small black bird with a mysterious aura. Though unable to speak, Nero communicates through various means, including gestures and writing. Neros are characterized as observant and intelligent, often taking a keen interest in the events around them. They display a sense of loyalty and protectiveness towards Asta, the main protagonist, and play a crucial role in his journey.


Nero’s true identity is revealed later in the series. He is actually a human named Secre Swallowtail, who was transformed into a bird after Lemiel Silvamillion Clover, the first Magic Emperor, was sealed into a statue. Secre was originally Lemiel’s servant and played an important role in his life. However, due to certain circumstances, she had to make the sacrifice of sealing him away to protect him and the Clover Kingdom.


As Nero, they take the form of a small black bird with prominent red eyes. Their appearance is unique, with black feathers and a distinctive crest on their head. Nero’s design reflects their mysterious and enigmatic nature, adding an air of intrigue to their character.


Neros possess powerful magic that can be used for a variety of purposes. They are particularly adept at sealing magic, as evidenced by their ability to seal away powerful beings such as Lemiel. Nero’s magic allows them to undo powerful spells and protect others from harm. They are often seen assisting Asta in battle, dispelling enemy magic or creating defensive barriers.


Nero’s origin is deeply intertwined with the history of the Clover Kingdom and the Magic Knights. As servants of Lemiel Silvamillion Clover, they witnessed the rise and fall of the first magical emperor. Nero’s transformation into a bird and subsequent encounters with Asta and the Black Bull Squad shaped their role in the ongoing conflict against the dark forces that threaten the kingdom.

Nero – FAQ

Who is Nero in “Black Clover”?

Nero, also known as Secret Swallowtail, is a character in the manga and anime series “Black Clover”. She is a former servant of the first Wizard King of the Clover Kingdom and a member of the Black Bulls, a group of magical knights.

What is Nero’s magic power?

Nero possesses the unique magic power known as “Sealing Magic”. With this power, she can seal away and nullify the effects of other people’s spells. She can also use her magic to create barriers and defensive shields.

What is Nero’s role in the story?

Nero plays a significant role in the story of Black Clover. Initially appearing as a small bird, she takes on human form and becomes an important ally to Asta and the other members of the Black Bulls. Nero assists the protagonists in their battles against powerful enemies and provides crucial information about the history and secrets of the kingdom.

What is Nero’s backstory?

Nero’s backstory is revealed throughout the series. She was a servant to the first Wizard King, Julius Novachrono, over five centuries ago. During a great battle against a powerful demon, Nero used her sealing magic to seal the demon away, at the cost of being transformed into a bird and losing most of her magical powers. She has been searching for a way to undo the seal ever since.

Does Nero have any unique abilities besides her magic?

In addition to her seal magic, Nero has a few other unique abilities. She has enhanced senses that allow her to detect magic and perceive things that others cannot. She also has the ability to temporarily increase the power of other people’s spells, though there are limitations to this ability.

Is there a romantic relationship with Nero?

There are no explicit romantic relationships involving Nero in the series. However, she shares a deep bond and mutual respect with Asta, the protagonist of Black Clover. Their relationship is primarily portrayed as a strong friendship and partnership based on trust and support.