Secre Swallowtail

The anti-magic bird Nero, who everyone used to know as Secre Swallowtail, has one of the most mind-blowing plot twists in the whole Black Clover anime. For hundreds of episodes, she just sat on Asta's head like a funny little mascot. But she is really a five-hundred-year-old mage who worked for the First Wizard King and used magic that was against the rules to save the whole Clover Kingdom. She finally gets her real human body back and officially joins the Black Bulls as a key support mage. Seeing her change from a sassy bird to a deeply sad, fiercely loyal friend is a masterclass in how to tell a story.

Secre is a top-tier gothic waifu in terms of looks, but she always looks tired. She has choppy black hair with two tail pieces that look just like her old bird tail, striking red eyes with heavy bags underneath, and these cute little black horns that she got from using forbidden magic. She usually wears a pretty gothic dress with a classic Black Bulls robe over her shoulders. She is a total deadpan kuudere when it comes to her personality. She still treats Asta like her own furniture and makes fun of him all the time, even when she's a person. Fans loved her right away because her sad, sleepy-eyed look and very sad backstory made her impossible to resist.

Secre's wallpapers give your desktop a perfectly moody and classy look. Artists love to draw her with her cute Nero bird form or show her casting glowing Sealing Magic spells. There are a lot of beautiful, softly lit backgrounds of her looking up at the sky with those striking red eyes that you can easily find. If you're a real Black Clover fan, this sleepy, gothic kuudere on your screen is the best choice.