Call him Bob.

Nomenclature is just a convention of convenience and can be ever so judgemental.

Particle / anti-Particle ... way to lead the jury, hey?

What we do know is that when Bob walks up to a mirror he sees adastra22.

The glass is likely there to stop them touching and spawning a new universe.

Notice how in your own example, the anti-particle is not the particle, and Bob is not adastra22.

I did notice that these things are labels and not objects.

Good point.

And it would revolutionize our current understanding of physics to find out that p = p̄