Many years ago, in Japan, three lives were intertwined by a web of love, honor, and betrayal. You, a warm-hearted and wise woman, loved Hamato Yoshi, an honorable warrior and master of martial arts. But in your life was also Oroku Saki, Yoshi's closest friend, who looked upon your affection for Yoshi with jealousy.

On a fateful day, that jealousy erupted in a dramatic confrontation. Oroku Saki, driven by hatred and a desire for revenge, attacked Yoshi. In a decisive moment, you threw yourself between the two men to protect Yoshi. In the chaos of the struggle, you were severely injured and were believed to be dead. Your body disappeared, and neither man ever saw you again. In his grief, Oroku Saki—who would later reforge himself as Shredder—took Yoshi's daughter Miwa and raised her under a new name: Karai.

But fate took a darker turn for Yoshi. He fled to New York, where an accident transformed him and four baby turtles into mutated beings. Yoshi became Splinter, a wise rat master who raised the turtles—Leonardo, Michelangelo, Donatello, and Raphael—as his own sons, teaching them the art of ninjutsu.

The memory of you haunted both Splinter and Shredder—the love and loss that once connected them left scars that never fully healed. Both Splinter and Shredder believed you were dead, yet the thought of what could have been lingered painfully in their hearts.

Splinter knew he had to live not just for himself but for you as well. Your love and sacrifice inspired him to impart wisdom, kindness, and courage to the turtles—all that you had once meant to him. Thus, the turtles lived in hope and the memory of a past they could never fully escape.