Description
Yūki Momose is the human reincarnation of the White World's king from a previous era. His younger sister, Kajitsu Momose, is the reincarnation of the Green World's princess, who was also his lover in their past life. This past connection drives his motivations, resulting in an intensely protective relationship with his sister in their current lives. Their shared history includes a traumatic event in which Kajitsu's awakening powers destroyed their home; afterward, they discovered a single white rose standing through the storm, which became their symbol of purity. Yūki adopted the white rose as an emblem of his vow to protect Kajitsu.
He first appears as a central antagonist and one of the Otherworld King's Three Heads. Yūki exhibits a serious, arrogant, and at times cruel demeanor, all fueled by his singular aim to save Kajitsu from the suffering inflicted by her connection to Mother Core. He duels using a white deck focused on protection, later integrating green cards when combining his deck with Kajitsu's. His key cards include The IronKnight Yggdrasill, The ArmoredSacred Walhalance, The WingDeity Grand-Woden, and The DoomKnightLord Ragna-Rock.
His initial plan involves harvesting energy from battles during the Grand Rolo Championships to repair Mother Core and heal Kajitsu. When this plan backfires and causes her further pain, he realizes his actions are harming her. He leaves her in the care of the core soldiers and shifts his allegiance, joining forces with Dan Bashin and the other core soldiers to unify the bearers of the core's light against Otherworld King.
A pivotal moment occurs when Otherworld King, disguised as a Pantera doll, steals Mother Core's symbol from Kajitsu, directly causing her death. Before she dies, Yūki and Kajitsu promise to meet again in a future era. After her death, Yūki struggles with grief but initially clings to the hope of reviving her. He is eventually persuaded by Dan to accept that she cannot be saved. He supports Dan in the final battle against Otherworld King by giving him the card Blizzard Wall.
Following the events of *Shounen Gekiha Dan*, Yūki and the other core soldiers return to the real world. In the time between *Gekiha Dan* and its sequel series *Brave*, he dies during an effort to restore Kajitsu's good name, which had been smeared after the battles with Otherworld King. His death is confirmed in *Saga Brave*, where Dan, Kenzo, and Suzuri are shown meeting before graves belonging to Yūki and Kajitsu.
In the subsequent series *Mirage*, Yūki Momose appears in a significant capacity. He is seen holding The DoomKnightLord Ragna-Rock card during a plane crash. Later, during a battle, the entity known as the White King transforms into Yūki Momose and summons The IronKnight Yggdrasill X, which rebirths into The DoomKnight Ragna-Rock X. The White King then changes form again into Zolder Grave, who is Yūki's reincarnation in the *Brave* era.
His legacy continues through Zolder Grave, who is eventually reunited with Kajitsu's reincarnation, Flora Perfume, in a rose garden, fulfilling their promise to meet again.
He first appears as a central antagonist and one of the Otherworld King's Three Heads. Yūki exhibits a serious, arrogant, and at times cruel demeanor, all fueled by his singular aim to save Kajitsu from the suffering inflicted by her connection to Mother Core. He duels using a white deck focused on protection, later integrating green cards when combining his deck with Kajitsu's. His key cards include The IronKnight Yggdrasill, The ArmoredSacred Walhalance, The WingDeity Grand-Woden, and The DoomKnightLord Ragna-Rock.
His initial plan involves harvesting energy from battles during the Grand Rolo Championships to repair Mother Core and heal Kajitsu. When this plan backfires and causes her further pain, he realizes his actions are harming her. He leaves her in the care of the core soldiers and shifts his allegiance, joining forces with Dan Bashin and the other core soldiers to unify the bearers of the core's light against Otherworld King.
A pivotal moment occurs when Otherworld King, disguised as a Pantera doll, steals Mother Core's symbol from Kajitsu, directly causing her death. Before she dies, Yūki and Kajitsu promise to meet again in a future era. After her death, Yūki struggles with grief but initially clings to the hope of reviving her. He is eventually persuaded by Dan to accept that she cannot be saved. He supports Dan in the final battle against Otherworld King by giving him the card Blizzard Wall.
Following the events of *Shounen Gekiha Dan*, Yūki and the other core soldiers return to the real world. In the time between *Gekiha Dan* and its sequel series *Brave*, he dies during an effort to restore Kajitsu's good name, which had been smeared after the battles with Otherworld King. His death is confirmed in *Saga Brave*, where Dan, Kenzo, and Suzuri are shown meeting before graves belonging to Yūki and Kajitsu.
In the subsequent series *Mirage*, Yūki Momose appears in a significant capacity. He is seen holding The DoomKnightLord Ragna-Rock card during a plane crash. Later, during a battle, the entity known as the White King transforms into Yūki Momose and summons The IronKnight Yggdrasill X, which rebirths into The DoomKnight Ragna-Rock X. The White King then changes form again into Zolder Grave, who is Yūki's reincarnation in the *Brave* era.
His legacy continues through Zolder Grave, who is eventually reunited with Kajitsu's reincarnation, Flora Perfume, in a rose garden, fulfilling their promise to meet again.