We are lynching Tris because she gives us info on Odd, you, and Usopp. Odd saw a couple of actions target Usopp and the action that Tris said she targeted him with was not listed.
So either Tris is lying or Odd is lying. Or like Kvothe said, in the very unlikely scenario, Tris was role blocked and Odd is probably telling the truth. But I doubt that since Tris said that she didn't have any abilities in the previous day phase.