Raiden Mei (Chinese: 雷电芽衣; Japanese: 雷電芽衣) is a playable character in Honkai Impact 3rd. The daughter of the prominant Raiden Ryoma, she has beautiful and demure looks. This, combined with her mastery of Bushido and Itto-ryo, make her a true incarnation of silk hiding steel. She attends St. Freya Academy alongside Kiana and Bronya. She normally does not use the tremendous power within her... except when dire circumstances bring it forth.
Mei is most easily recognized by her thigh-length black hair (depicted as indigo in game/artwork). She keeps half of it tied up in a ponytail and decorates it with pins or other ornaments. She is also the tallest of the Valkyries, standing several centimeters taller than even her instructor and superior captain, Murata Himeko. Due to her many years practicing and teaching swordsmanship, she has a toned build.
Perhaps in spite of the distance she received from others due to her position and powers, Mei is kind and caring. She is also an excellent student who studies diligently on her own as well as helping her classmates prepare. Her cooking skills are excellent as well, many fights have broken out over who gets a slice of her delicious cakes.
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In contrast to to Mei's kind and caring nature, the 3rd Herrscher is haughty and somewhat arrogant. She looks down on normal humans and, like other Herrschers, has an instinctive hatred towards them and the world. In addition, despite her having Mei's memories, she firmly rejects them, claiming they are not her own, and has shown a personal disdain towards her, viewing her as being weak due to her kind nature.
Despite initial appearances, however, the 3rd Herrscher also a somewhat lonely side to her as a result of never being able to interact with others. Because of this, she grew interested in Kiana as she was the only one who could approach her, declaring only she has the right to kill her. In reality though, the 3rd Herrscher had plenty of opportunities to kill her but chose not to and she seems to actually enjoy her company but is too proud to admit it, making her somewhat of a tsundere. Over time, she also seems to have become more accepting of Mei.
Her old profile listed her age as 17 and her "three sizes" as 89 cm / 62 cm / 90 cm.
Her given name is made up of the kanji for "bud/sprout" and "clothing", while her surname means "lightning".