Height 172 cm (5'8") Raiden Mei is one of the main protagonists along with Kiana Kaslana, Bronya Zaychik, Theresa Apocalypse and Murata Himeko. She is the daughter of the Massive Electric Industries' CEO. When she was young, her father was arrested for fraud and most of her family assets were seized due to her father’s criminal activities, and was later captured to be part of a Honkai-related experiment. This event has caused her to be cold and distant towards others, though her friendship with Kiana has caused her to become more gentle and caring.

Spoiler

She also has a Ruler sealed within her, which was unleashed during the Choukuu City event, and later awakened as the 3rd Herrscher. After Kiana stopped her, she joined Schicksal shortly after learning on how to control her power.