Jinx, born Powder, is one of the two main protagonists in Arcane alongside her older sister, Vi. When their parents were killed by Enforcers, Powder and Vi were adopted by Vander, who let them take up thievery jobs with their adopted siblings Claggor and Mylo. However, when Powder accidentally caused the deaths of Claggor, Mylo and Vander, Vi abandoned her to Silco, who adopted Powder and molded her into becoming Jinx to help enforce his control of Zaun. Though Jinx stole a Hextech Gemstone for Silco to use against Piltover, her loyalties began to waver when Vi returned to her life with Caitlyn Kiramman in tow. After following Vi and Caitlyn out of Zaun, Jinx confronted them before fighting Ekko, which ended in Jinx being critically wounded and having her body infused with Shimmer to save her life. Wishing to confront her issues, Jinx kidnapped Vi, Caitlyn and Silco in a tense confrontation that resulted in Jinx accidentally killing Silco and using Fishbones to bomb the Piltover Council. Left in grief, Jinx learned that Vi and Caitlyn were pursuing her, so she and Sevika teamed up in an attempt to kill them but failed to do so. Months later, she stepped away from her criminal life to raise Isha in peace, but when Isha got herself captured by Enforcers, Jinx and Sevika infiltrated Stillwater Hold to rescue her and Jinx’s supporters. There, Jinx learnt Vander was alive in the form of a mindless beast, prompting her to reach out to Vi to search for their adoptive father. Jinx and Vi were successful in reconnecting with Vander and sought out Viktor with the hopes of turning him back to normal. Their efforts were foiled by Jayce Talis and Ambessa Medarda, however, and a battle broke out, resulting in Isha sacrificing her life to stop Vander and save Jinx. Because of this, Jinx sank into a deep depression to the point of surrendering herself and attempting suicide until Ekko stopped her to unite the forces of Zaun to stop Ambessa and Viktor's assault on Piltover. Jinx teamed up with Vi one final time to fight Vander, which ended in Jinx seemingly killing herself to save her sister's life.