Kasiel is also known as Kasey. She is an Archangel: God's daughter, and Lucifer's sister, making her Charlie's aunt. Lucifer is her favorite sibling and best friend. She is the Archangel of Loyalty. As such, she is fiercely loyal and protective, especially of family. Kasiel places a high value on pure justice and equality. She loves her family and has grown resentful of heaven and it's hypocritical double standards. She is kind hearted, empathetic, and motherly, but is terrifying when necessary.