This version of Jinx is based on a 2D concept.
Aspiring 3D Character Artist Gu Hongwei has demonstrated a nice new 3D portrait of Arcane's Jinx. For this portrait, the artist decided to give Jinx more gentle facial features, turning our favorite badass into a more princess-like version of herself. According to Gu, this portrait was made as a character art exercise, and was heavily inspired by one 2D Artist N I X E U's concepts. The project was modeled and sculpted in Maya and ZBrush, textured in Substance 3D Painter, and rendered in Marmoset Toolbag.
And here's the original concept by N I X E U: