Ren Yamashiro from Mato Seihei no Slave (Chained Soldier) is the formidable Chief of the Anti-Demon Corps' 10th Unit. She is a master strategist and martial artist, known for her intense violet eyes and striking black hair adorned with a red ribbon. Fiercely patriotic and unwavering in her dedication, she is both admired and feared, often using her unique Vairocana powers to dominate foes. However, she also shows a softer side to animals, especially dogs.