Nagisa Gen

History
Gen was one of the four geniuses of Karakura, along with Yue Kaida, Saito Hiro and Tanaka Yuichiro and was considered a peerless sword cultivator in Karakura.

However, when Saito Hiro attacked and banished Yuichiro from the Imperial City, Gen got injured ensuring the lives of Yuichiro and baby Areshi.