Mei is someone with a long history of neglecting her own feelings. Even before her father was arrested, she was used to silently accepting her loneliness within the home. When she went from being the center of attention at school to a "criminal", though, she grew more jaded. Mei is the daughter of Raiden Ryoma, the CEO of ME Corp, an electronic company and subsidiary of Anti-Entropy. She was born in Nagazora City, Japan on April 13.