While Ei has a more stern demeanor than the average person, she is notably more emotive and sociable than the Shogun. Unlike the Shogun, Ei has preferences, such as a love for sweets and passion of martial arts. Due to her dedication to eternity, Ei maintains a wary attitude on the idea of change. Raiden Ei, known as Beelzebul, is the true Electro Archon of Inazuma who withdrew into the Plane of Euthymia after the death of her twin sister, ruling through the Raiden Shogun puppet in her pursuit