Reidō

"There's no such thing as peace. Even the concept's overrated. Come with me child, if you seek truth."

- "Mother" to Seraph

Reidō (令堂, Reidō) better known as Mother (母さん, Kaasan) by her associates and "children" is a century old assassin who has a particular taste for brain washing and manipulating young children and training them to become world class assassins. Also known as Alththani min Al-ghul (الثاني من الغول; lit. "Second of the ghouls"), Reidō is a ghost and prefers to pull the strings from the shadows, causing many people to doubt her very existence. In fact, she is so secretive that no one knows her last name and some even doubt that Reidō is her real name.

She is the founder and leader of an organization known as Children of Sorrow which comprises of young children trained to be lethal warriors; the members are anywhere from the age of 8-15 years of age. She also has connections with several businessmen across the globe and will do their dirty job for the right price. While her origin remains unknown, some speculate that she is an immortal being because of how long she has lived.