halo 5

who do you think is going to be the hero and villain in halo 5

Neither, just two different perspectives of the same story

All 8 spartans have to terminate Ghost Cortana lol
Their new armor includes Ghostbusters tools.

I don’t think the villain has been revealed yet.

The antagonist of H5 is unclear. Chief and Locke will certainly be contradictory perspectives of the games context. Right now it’s open ended and very interesting indeed.