Karen, as she appears in Rei Gaiden.
|Name in Kanji||カレン|
|Name in Romaji||Karen|
|Fighting Style||Nanto Hisui Ken|
Masaya (older brother)|
|Position(s)||Commander of Ken-Oh's Invasion Force|
- Karen (カレン Karen )
- Karen is a character who features in the Rei Gaiden serialization and The Magnificent Avenger one-shot. She was a female practitioner of Nanto Hisui Ken and once studied under Shu as his young apprentice. Karen was a sweet girl who grew up with Rei and cared deeply for his future as successor of Nanto Suichō Ken.
- After the nuclear war, her older brother Masaya, the successor to Nanto Hisui Ken, died fighting against the Holy Emperor's forces as a member of Shu's resistance. Karen was overcome with grief and joined the warlord Ken-Oh's army to restore justice to the world. Karen was present during Rei's battle with Rofu, and she would later fight him as a member of the Ken-Oh Invasion Squad who attacked Mamiya's village. Rei defeated Karen with the Hishō Hakurei technique. In her final moments, she found peace in Rei's arms.