In One Piece, Luffy’s Gear 5, also called Nika, has been making waves, but now Jewelry Bonney has joined the fun. Fans lovingly call her Nika form “Joy Girl.” She first shows this during the Egghead arc, fighting alongside Luffy against St. Saturn. Joy Girl isn’t an official name from Oda, but it stuck among fans. Don’t mix her up with Joy Boy, they’re completely different characters.
Bonney can become Nika thanks to her Toshi Toshi no Mi, or Age-Age Devil Fruit. Everyone thought her power only let her change her age, but it also has a secret ability called Distortion Future. This lets her access a future version of herself, any way she imagines it. When she was escaping Alpha, she used this to make her tiny hand huge, like Luffy’s Gear 3, and punched the enemy.
Later, during the Egghead arc, she wanted to keep up with Luffy in his Gear 5 form. Inspired by Luffy’s freedom, Bonney used her future powers to become the freest version of herself. That’s how she became the second Nika, Joy Girl.
In the manga, Bonney first becomes Joy Girl in chapter 1118. The anime hasn’t shown it yet, but fans can expect it in Episode 1151, titled “The Dream I Envisioned With Dad! Bonney’s Free Future,” airing November 30, 2025.
Bonney’s Joy Girl form does have limits. She can’t stay in this future form for long because it takes a lot of energy. After helping Luffy in the fight against St. Marcus Mars and St. Saturn, she returns to her normal kid form. She’ll only remain in Nika form for a few episodes before running out of stamina.
