Tatsumaki first meets Saitama in the anime in One Punch Man episode 10. In that scene, they cross paths during the Hero Association S-Class meeting, and Tatsumaki is immediately dismissive of him.

Episode detail

  • Episode 10 is the first anime episode where Tatsumaki and Saitama directly meet.
  • Their interaction happens at the S-Class meeting in the Hero Association.
  • This is their first on-screen encounter in the anime, not a fight scene.

Small note

If you meant their first major battle together , that happens much later in the story, but the first meeting is episode 10.