Background

Kurogane is a ninja directly under the service of Princess Tomoyo (a crossover character from Cardcaptor Sakura's Tomoyo Daidōji) of Shirasagi Castle. While he is undoubtedly the most powerful warrior in Nihon (the Kingdom of Japan), he shows no mercy to any assassins who try to invade the castle, killing them on the spot, even though Tomoyo has asked him numerous times not to kill them. Short-tempered and overly familiar with Tomoyo, the princess eventually decides that he needs to be sent to Dimension Witch Yūko Ichihara in order to discover true strength. Before she sends him off, Tomoyo curses him such that whenever he kills someone needlessly, he will grow weaker.

Kurogane, upon his arrival in the shop of the Dimension Witch, is the least informed as to who she is, but the most certain about what his wish is: he wants to return to his own world. Like his soon-to-be travelling companions, he must pay with what he values most to gain the ability to traverse dimensions. For Kurogane, it was his sword Ginryuu. He reluctantly agrees to give up the sword, but asserts that he will come back for it someday.

Character

Kurogane is serious and extremely perceptive, being able to quickly discern Syaoran's fighting ability (along with Syaoran's blind right eye) as well as Fay D. Flourite's true nature and fighting capabilities. While he seems rather irreverent, he is also very loyal, especially to Tomoyo. He is likely the most experienced fighter in the group and wiser than he appears. He becomes Syaoran's sword fighting teacher, presenting the boy with the same philosophy he believes in: a sword is used to cut only when needed and not used to cut anything if it is not necessary. While serious, Kurogane is very easily irked by others, especially by Mokona Modoki and Fay, who keep calling him ridiculously cutesy nicknames such as "Kuro-puu", "Kuro-wan-wan" or "Kuro-rin". However abrasive and ruthless Kurogane may seem, he has a compassionate nature and a desire to protect. An example of this would be how Kurogane continually questions Fay on his actions and character, and lets the wizard know that he should stop hanging onto his past and embrace the future with his new companions. Or, Kurogane's own statement that "If someone wants to take away the ones I want to protect, I'll kill them too."

His compassion and protective nature is especially clear when his actions early in the series are compared to his actions later on. He had straight out told Syaoran in their first world, the Hanshin Republic, that the quest has nothing at all to do with him. In the next world they visit (Koryo Country) however, Kurogane offers his services to help raid the castle of an evil lord, and stays behind in battle to let Syaoran go on ahead. Eventually, he risks a loss in strength to avenge his comrades' "death" (they were of course still alive) by defeating their killer in battle. It is noted that after he finds out Fay and Syaoran are still alive, he lost his passion for the battle.

He obtained a new sword in Ōto called the Sōhi (Blue Ice) and taught Syaoran the skills of sword fighting and sensing attacks from the left. Thanks to Fay, Kurogane could summon his sword from his left hand in a similar way to Syaoran in case Mokona was not there to give him his sword. However, he sacrified this arm along with Sōhi to let Fay escape from Celes. Kurogane shows much more inner compassion from his actions in the latest chapters, such as the aforementioned rescuing of Fay from Celes.

Story

At the beginning of the story, Kurogane told Syaoran that he would not help in finding Sakura's feathers, since it was not related to him. However, he ended up aiding Syaoran and the others anyway, teaching Syaoran how to fight and use a sword as well.

Kurogane showed a strong reaction when he saw another Tomoyo in Piffle World. After hearing how she met Princess Tomoyo in a dream, he hesitantly asked her how Princess Tomoyo is. Just before he left, he affirmed that he will definitely go home.

In the Tokyo arc, Kurogane was involved in a short fight with Kamui. Later, he wished to Yūko to save Fay's life, after Fay's eye was ripped out by the clone Syaoran. Through an arrangement by Yūko, Kurogane and Kamui mixed their blood and forced Fay to drink it. Fay thus became a vampire and survived. Since it was not Fay's wish to live but Kurogane's, Fay can only take blood from Kurogane. Fay refrained from calling Kurogane nicknames from then on, in an effort to distance himself from Kurogane.

Kurogane noticed that Fay and Sakura were up to something in the Infinity world, but did not say anything. After Sakura left, however, he finally spoke up, refusing to let Fay give up his eyesight to go to Celes. Kurogane told Yūko they would all pay a fourth of the price to go save Sakura's body from Celes.

In the latter parts of Volume 20, Ashura used his magic to show Syaoran, Kurogane, and Mokona visions of Fay's tragic past. This caused an angry Kurogane to unsheath his sword and attack Ashura and Fay. He and Fay fought fierce battle that devastated the room around them. In the mayhem, Kurogane destroyed the body of Fay's twin and managed to overpower Fay in that moment of weakness. Kurogane then turned on Ashura, demanding to know why he'd shown them Fay's memories. The king responded by saying that he only wanted Fay to "grant his wish" and kill him. Ashura then launched vicious spells against Fay, Kurogane, Syaoran, Mokona, and a defenseless Sakura's body in order to force Fay's hand. In the chaos that followed, one of the massive ice stalagmites that he conjured pierced Kurogane through his lower right side.

Kurogane is then apparently spared the damage due to the protective spell that placed upon him before leaving Japan by Tomoyo. He then stabs Ashura, and after the king's death, Fay's second curse activates.

Fay's second curse caused him to suck up the world of Celes; Fay tries to transport Kurogane and the others out of the small sphere that Celes has become, but he doesn't have enough magic to do so. He only succeeds in transporting Syaoran, Sakura, and Mokona. Then Mokona's earring (a magical tool made by Yūko) was able to drill a hole into the sphere, but only one person could pass through. When Fay told Kurogane to leave him, Kurogane cut off his left arm and left it and Sōhi as a sacrifice and rescued Fay.

In Chapter 167, Kurogane wakes up and finds himself back in his country, with Princess Tomoyo by his bed. Tomoyo welcomes Kurogane home and asks him if he has found out the true meaning of strength, to which he replies that he doesn't know. However, he explains to Tomoyo that he doesn't regret giving up his arm to take Fay with him, and tells her that he knows that some things can't be protected only by (physical) strength. This surprises Tomoyo, but she acknowledges that Kurogane has definitely realized the true meaning of strength. She then lets Fay into Kurogane's room. Kurogane seems genuinely pleased to see Fay, while Fay doesn't express much emotion, until suddenly - he punches Kurogane. Kurogane doesn't quite react to this, far too startled. Fay then smiles at him, saying "This is payback, Kuro-sama." The smile seems like the real thing, and Fay has gone back to using suffixes on Kurogane's name. Kurogane grins back, promising to beat Fay up for that.

In Chapitre 169, Kurogane is approached by Fūma who has come to Nihon Country with an artificial arm from Piffle World, however Kurogane refuses the arm by saying that he "will not pay anything to that witch for it." Fay replies by saying that he had agreed to pay the price while he slept, and gave up the last of his magic. In the second to last page of 169, Kurogane is seen with the arm attached, but claims that it "feels weird."

Early life

Kurogane grew up in the province of Suwa in Nihon. His father was the lord of the province and a great warrior whose job was to protect Suwa and its people. His mother was a miko who also protected the land with a magical barrier or protective ward (called a kekkai) that prevented demons from entering.

Kurogane was an energetic and outgoing child who never wanted to disappoint his mother and wanted to be just like his father. Under his supervision, Kurogane was trained in the use of the katana and also learned his father's special technique, Hama Ryū-ō Jin, which later on became his trademark. His ambition was to become stronger, not for the sake of being strong, but so he could use his strength to protect the people of Suwa and his parents.

When Kurogane became a teenager, trouble began. His mother had tuberculosis and would often collapse, coughing up blood, and Kurogane would strain himself to make sure she felt comfortable. His father was also away most of the time to fight against the demons. Finally, one day, Kurogane came home to find his father seriously injured and his katana in shards. Seeing that he needed more power, Kurogane's father decided to take the katana Ginryū (silver dragon), their family heirloom, to fight the demons. With the blessing of Kurogane's mother, his father left to fight, leaving Kurogane to protect his mother at home and told him that he should always use his strength to protect the ones he loves.

Right after he left, Kurogane's mother collapsed again. Even though she was in a critical condition, she insisted that she be taken to the Inoriba (meaning Place of Prayer) to pray for success against the demons. Moments later, Kurogane found his mother in the Inoriba, impaled by a large sword with a peculiar bat-like carving for its hilt that had suddenly appeared out of a void and disappeared before Kurogane could react. Despite his efforts, he could not stem the blood flow and she died. At the moment of her death, the kekkai broke and the demons swarmed through the province. One of the demons approached Kurogane carrying his father's severed arm, the hand still carrying Ginryū in its death-grip. As the demon devoured the arm, the katana fell to the ground. Kurogane's resolve broke and, in fierce rage, he took up his father's sword and charged towards the demons.

Hours later, the Empress of Japan, Amaterasu (Kendappa-ō of RG Veda), arrived with her army. She deduced that both the lord and the lady of Suwa had died, and demons swarmed the province as predicted in the dreams of her younger sister, the miko-princess Tsukuyomi. They found that all the demons were killed with Kurogane still in the ruins of his home. As Amaterasu approached Kurogane, who was too shocked to fully comprehend all that had happened and was still carrying his mother's body, he attempted to attack her. The empress ordered her ninjas to attack, but soon realized that Kurogane had lost his sanity and would do more harm than good when he killed all her warriors with ease. Amaterasu decided to personally subdue him, but was interrupted by Tsukuyomi.

Rather than let her sister subdue Kurogane, Tsukuyomi suggested that she do so. Using her magic, she stopped Kurogane from attacking her, knelt beside him and whispered, "Let's let your mother sleep, shall we?" as she closed the dead miko's eyes. At those simple words, she managed to snap out of his madness. Realization swept over him and he broke down in tears, and finally, exhausted, he fell asleep.

When he woke up, he found himself cleaned and his hand in bandages. Beside him, little Tsukuyomi, carrying Ginryū in her lap, explained that he was in Shirasagi Castle. She introduced herself as Tomoyo Daidōji; Tsukuyomi was a hereditary title given to the miko princess of Shirasagi Castle. Kurogane asked that Ginryū be buried with his mother's body since his father had no remains. Tomoyo agreed to grant his request and also informed him that she would commission another katana exactly like Ginryū for him so that he may continue to fulfill his father's wishes.

Later, Kurogane was accepted as a ninja of Shirasagi Castle, yet he still continued to search for the carrier of the sword that killed his mother. He never found another sword like it and only recently discovered (from Syaoran accidentally viewing Kurogane's memories in the Book of Memories in Rekord) that the one responsible for his mother's death was the same person (Fei Wong Reed) who attacked Sakura when her wings appeared in the Kingdom of Clow.

Fei originally intended to turn Kurogane into his "pawn", similar to what he did with Fay. However, Yūko foresaw this happening and used her powers so that Kurogane would fall under Tomoyo's command, avoiding Fei's grasp.