Pope's Bodyguard: Dr. Domenico Giani, Inspector General of the Vatican police and security
The Gendarmerie Corps are equipped with a full range of modern weaponry, include Glock pistols and Heckler & Koch and Beretta sub-machineguns. Their tactical teams use Carbon 15 machine pistols and Heckler & Koch/FABARM shotguns.
For the Pope’s recent and very high-security visit to the U.S., Dr. Domenico Giani, the Inspector General of the Vatican police and security, led the team. He is also Pope Francis’s personal bodyguard. He is usually seen off the front fender of the Pope Mobile during transits.
https://foxtrotalpha.jalopnik.com/the-pope-has-a-small-but-deadly-army-of-elite-warriors-1733268646
https://en.wikipedia.org/wiki/Domenico_Giani