The series has not clearly confirmed a single traitor yet in the material surfaced here; most discussion is still treating it as an unresolved mystery, with speculation pointing at multiple suspects rather than one definitive culprit.

What the current chatter says

  • One recent review says Will and the others are still trying to identify the traitor from Goetia who helped with the Terminalia attack, and that they still do not know who is trustworthy.
  • A chapter discussion headline claims the traitor’s identity was revealed, but the accessible snippet only says “another traitor” was revealed, without naming a fully confirmed person in the snippet itself.
  • Fan discussions are still divided, with theories mentioning possible hidden figures like someone from the Colorless City, a higher institution, or even Shade in disguise.

Best current answer

So the safest answer is: it’s still not cleanly settled from the sources available here, and fandom speculation is ongoing.

One-sentence take

If you saw a post asking “who is the traitor in Wistoria,” it is most likely referring to the ongoing traitor investigation arc , not a universally confirmed reveal.