Yamashiro Ren
In Mato Seihei no Slave, Yamashiro Ren is the most powerful person. She is the top boss of the whole Anti-Demon Corps, so she is at the top of the food chain. Everyone holds their breath when she walks onto the battlefield. Ren is not just another captain. She is a force of nature who completely takes over every scene she is in. It is not often that a leader lives up to all the crazy hype, but she does it without even trying. If you like women who are very strong and deserve all the respect they get, she is perfect for you.
Her design screams power and authority. Ren has beautiful long black hair, piercing blue eyes, and an aura of authority that is hard to ignore. She looks great in the standard military uniform, but she looks even better with a badass coat over her shoulders. Her grown-up body does not hurt either. That crazy gap moe is what makes fans completely crazy about her. She looks like she wants to step on me and kills enemies without mercy. But inside, she really loves cute dogs. It is funny to see this terrifyingly strict commander lose her mind trying to pet Yuuki when he is a slave. Plus, manga readers say that her ecchi reward scenes are some of the best ever.
Ren is a great choice for wallpapers because she gives off such dark and powerful energy. Artists always draw her looking down at the viewer with that cold glare that is so famous. There is a lot of fanart that shows off her great power or focuses on her mature ecchi appeal. Her fanart never misses, whether you want a badass action shot of the Commander General dominating the sky or something a little more spicy for your desktop.