Secre Swallowtail

Secre Swallowtail is a noblewoman and the former servant of Prince Lemiel Silvamillion Clover, the first Wizard King. She is transformed into an anti-bird named Nero after sealing Lemiel into a statue. Five centuries later, she decides to stay alongside Asta after encountering him at the beginning of the Magic Knights Entrance Exam. After regaining her human form, she is accepted herself as a member of the Black Bull squad of the Magic Knights. As a human, Secre is a short, slender woman with black hair in a bob style. Two locks of hair stick up from the top of her head. She has dark bags under her eyes. She wears a black dress with thin straps and a short, ruffled skirt that resembles feathers. Due to using Forbidden Magic, she grows two black horns on the sides of her head. After becoming a member of the Black Bull squad, she begins wearing the squad's signature robe. After six months of training in the Heart Kingdom, she wears a modified version of the robe, which is held by a grey cord. As an anti-bird, Nero is a very small bird with a pair of sleek wings, a pair of tails that form an arrow at the tip and a black beak. Nero's feathers are black at the back, white at the front, and red on her face. In addition, Nero also possesses a pair of horns on either side her head and a pair of long black feathers sticking up from the top of her head. One of her notable features is her slanted eyes that give Nero a hostile aura. The design of her eyes are present in both Nero's human and anti-bird form. Furthermore, the feathers around Nero's neck have a fuzzier texture then the rest of her feathers, which creates the sense of wearing a collar around her neck. While working in the Magic Tool Research Lab, Secre wears a white lab coat and glasses. Secre is generally apathetic. In situations where those around her are behaving intensely, particularly during moments of shock and excitement, she maintains a deadpan disposition and has a tendency to get straight to the point with little regard to the antics happening around her, such as when Charlotte Roselei ran away in embarrassment from Yami Sukehiro and she simply mused whether or not he had the opportunity to ask about the weg. When she becomes annoyed, she repeatedly pecks at Asta's head or pulls on his hair. Additionally, she also has a penchant to use this tactic to get her thoughts across to others as well, or when she is disagreeing with them. In contrast to the way she treats him, Secre is very loyal to Asta, as she rarely leaves his side. She also constantly helps Asta in every predicament, such as guiding him through the dungeon or showing him the path to an artifact behind the wall. While Secre initially only followed Asta because of his grimoire, she grows to genuinely care for him as the series progresses. She also possesses a strong sense of loyalty and devotion to Prince Lemiel Silvamillion Clover, having defied natural law to keep him alive and caused herself to be sealed as a bird, and despite this, she still retained her strong sense of loyalty towards him and she even went as far as stating that she would gladly follow him to the afterlife when his body began to crumble after exhausting his power.