Naruto: Shippūden (2007)

S20E431 To See That Smile, Just One More Time

Trapped in the Infinite Tsukuyomi, Karin experiences vivid memories of her life. Born into the Uzumaki Clan, she possesses a rare healing power that activates when someone bites her. After being expelled from her village, she finds refuge in the Hidden Grass, where her ability is exploited. Despite her ongoing pain, she perseveres for her survival. Eventually, she participates in the Chunin Exams, where Sasuke comes to her rescue. Karin has always held onto the gratitude for his intervention and the warmth of his smile.