Antimatter Electron With Negative Inertial Mass Is It Possible?

I wonder if it's possible like could you have maybe a third version of an electron not just a positron but something that has its opposite charge but also has negative inertia. We're pretty sure that antimatter has inertial mass the same way that normal map does all. It's totally possible to come up with another idea like a particle that is just like the electron but with negative inertial mass and say maybe it could exist in the universe.