Himeragi Yukina
Himeragi Yukina is the main heroine of the famous supernatural harem series Strike the Blood. The Lion King Organization sends her as a highly trained Sword Shaman to watch over Kojou Akatsuki, the Fourth Progenitor, who is incredibly powerful. Her job is to kill him if he ever becomes a threat. But, of course, things do not always go as planned. Instead of killing him, she quickly becomes his most loyal partner, his main blood donor, and one of the most devoted main waifus in anime history. She is the cute anchor that keeps the whole series together.
Yukina looks perfect in every way. She has long, dark hair that looks great on her, and she wears her signature school uniform to almost every battle where her life is on the line. With her famous silver spear, Sekkarou, she dances through battle with deadly grace. Her stubbornly cute personality and famous catchphrase are what make her fans so crazy about her. Whenever Kojou tries to deal with a dangerous situation on his own, she tells him right away, "No, Senpai, this is our fight!" It is pretty much the best anime meme ever. She is very serious and proper, but when Kojou's vampire urges kick in, she gets really upset. The ecchi blood-drinking scenes between them are the best of the best, mixing intense action with very hot fanservice.
Yukina is the franchise's most famous character, so her wallpapers are very pretty. Artists love to draw her in cool action poses with Sekkarou and her uniform blowing in the wind. There is also an endless amount of fan art that shows off her huge ecchi appeal, like this one that shows her blushing just before a classic blood-drinking scene. If you have a Yukina wallpaper, it shows that you really respect one of the most loyal heroines ever made.