alt Hacker NewsCall 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.