Ren is a central character in the anime series Dramatical Murder. He is Aoba Seragaki's All-Mate, a type of AI companion that takes the form of a small blue pomeranian dog. Ren is known for his calm, rational demeanor and serves as Aoba's confidant and protector throughout the series. Despite being an AI, Ren displays a strong sense of loyalty and emotional depth, often guiding Aoba through difficult situations. His true origins and deeper connection to Aoba are revealed as the story unfolds, making him an integral part of the narrative.