Master Chief is the star of Halo 5, sorry Agent Locke - Polygon

In an interview with X-One magazine earlier this month, actor Mike Coulter — who plays Agent Jameson Locke in the Halo: Nightfall TV series and upcoming Halo 5: Guardians — stated that he will be

Halo Infinite - Wikipedia

Master Chief Is Not the Protagonist of Halo 5: Guardians, Replaced by Agent Locke, Claims Actor

Halo 4, Halo University Wiki

Master Chief VS Locke in Bungie's Artstyle : r/halo

How Agent Locke VS Chief FAILED In Halo 5! (and Halo 6's New Direction)

January, 2015

What do you think Spartan Locke will look like in Halo Infinite? : r/halo

Halo 5: Guardians (2015)

Why did Locke address the Master Chief as 'sir' in the ending of Halo 5 even though he outranked him? - Quora

Halo 5 Main Protagonist is Master Chief, Not Agent Locke - IGN

Yes, Master Chief is the star of Halo 5: Guardians