Believed to be the most feared and powerful Toushi around, she even carries the nearly invincible Blue Dragon Crescent Blade from her predecessor as well as the legendary sword Kusanagi; she also has overwhelming chi. She believes her destiny is to die protecting Ryuubi. It is believed by many characters that Ryomou will one day kill her. Presumed to be an old friend of Kakouton and Kakuka. Despite this, however, she seems to have taken an interest in Koukin (this happens only in the “English Adaptation”, it is not present in the original JPN manga). She is eventually forced to side with Sousou and plan an attack on Nanyo in order to protect Ryubi from Kyosho’s toushi, who would certainly be after her. When she surrenders she is treated as a prisoner. She is handcuffed, beaten, and stripped of her clothing. When Ryubi submits the Gyokuji for Kan’u’s release, Kan’u refuses to accept the offer and stays as a prisoner under her own will. Sousou respects Kan’u’s wishes and orders the Gyokuji to be returned to Seito. Kan’u is able to break free from her handcuffs, clearly holding back while she was captive. She is now treated more fairly while being kept under Sousou’s orders.
In Ikki Tousen Dragon Destiny, Kan’u is similar to the manga version in terms of appearance. Like her predecessor in Romance of the Three Kingdoms, she is one of the pivotal characters in the events of the series, as she lives her destiny as Ryuubi’s protector and as one of the strongest toushi alive. Being the main character in this sequel, Kan’u’s invincibility was played down to make her character more believable; she wasn’t portrayed as strong as compared to the manga and the first anime series. Kan’u is less flirty, less confident, insecure, and her intentions towards Ryuubi are more obvious. She even admits her love for Ryuubi to Koukin.
When she sides with Sousou and with Hakufu looking to challenge Sousou to a fight, Kan’u accepts the fight on his behalf. She is seen with a new dark, yet still revealing costume, possibly acting as a metaphor for defecting to Kyosho’s evil leader. However, Kan’u’s loyalty to Ryuubi doesn’t shake nor does her superiority over other toushi (as Chou-un pointed out and later proven by Kan’u herself when she broke free of her handcuffs under her own power, she could have just left Kyosho if she wanted to). She made it clear to Kakouton that she will kill Sousou if he attempts to assault Seito or harm Ryubi in any way. She was told to leave Kyosho by Kakouton and she returned to her own school. However she takes Chou-un’s advice to stay away from Ryuubi, allowing Ryuubi to blossom as Seito’s leader. She returned at the Battle of Chibi to protect Ryuubi. At the end of the series Kan’u is still with Ryuubi, as her guardian and close friend. A joke at the end has Ryuubi recommending Kan’u to read a book called Ikki Tousen. The book is meant to be Romance Of the Three Kingdoms, which the series is based on. In the third season, she has finally came into terms with her feelings for Ryubi Gentoku (who seems unaware) and fantisizes about Ryubi doing intimate things with her on numerous occasions.