Shinra ends up with Iris in Fire Force ; the manga’s ending strongly implies they marry and have a child together.

Quick Scoop

  • Best-supported answer: Iris.
  • Why fans say that: the manga’s epilogue shows Shinra referring to Iris as his partner, and later material strongly indicates they built a family together.
  • Common fan confusion: some posts mention Inca because of late-series teasing, but the final endgame is Iris.

If you want, I can also give you a spoiler-free version or explain the ending timeline in 3 bullets.