You notice how all these ghosts are walking in pairs?
”According to Andy Ristaino, all the Gladiator Ghosts are homosexual. It can be noted that one of the ghosts calls the one he killed his love.[8]“ 

The gladiator ghosts were the first openly gay characters of the series.

This could be a reference to how Spartan warriors were often attracted to other males, being raised since age 5 around only other males.