Satsuki Ranjou  

, 嵐城 サツキ

Satsuki is a boisterous girl who is very confident and outgoing. She is Moroha's classmate at school and they share the same past life where they were once siblings. Despite not being related by blood in their current lives, Satsuki has developed strong feelings for Moroha and treats him like her big brother. This is due to their shared history as siblings in a previous life. In that life, they had an incestuous relationship and loved each other deeply. Satsuki's family often moves from place to place to avoid attacks from Metaphysicals, which makes it difficult for her to make friends. However, she is quick to help others even when she is in a disadvantage. Satsuki has excellent cooking skills and always prepares Moroha's meals. As a Savior, Satsuki is a Shirogane who uses light-based abilities that materialize into a short sword called "Acieal." She can also detect incoming Metaphysicals and later develops an armor of light called Kongoutsu which protects her from attacks. Additionally, she becomes much faster with the use of this armor.