Bodyguard
A bodyguard was someone who protected another person from harm. Typically such protection was against physical harm such as assault or even murder. Such a role could be part of the duties of members of police or military agencies, or be a private arrangement between two parties.

Alexana Devos wanted to be able to walk without bodyguards, as she lived in fear of Ansata terrorists. ()

The Hupyrian Maihar'du served as bodyguard, servant, and food taster to Grand Nagus Zek. 

 seemingly offered to act as the bodyguard of Quark while briefly serving as Grand Nagus in 2369. He offered to protect Quark from those who were "jealous" of his position while simultaneously threatening him harm if he did not receive lucrative Gamma Quadrant business opportunities. After that, Quark asked Rom to be his bodyguard. ()

Benjamin Sisko provided bodyguards to Li Nalas in 2370 when the Alliance for Global Unity was threatening the Bajoran Provisional Government. Sisko feared that Li's status as a hero would make him a target of the Alliance. While Li felt such protection was unnecessary, Sisko provided it nevertheless. ()

When Captain Kathryn Janeway informed Tom Paris that she invited Chakotay and the other Maquis members to join the crew of the , Paris asked her if she would provide a bodyguard for him. ()

In 2372, Liquidator Brunt visited Deep Space 9 to stop Rom's union in Quark's. He was accompanied by two Nausicaan bodyguards who beat up Quark. ()

When Worf fought Gowron, Odo asked  the rhetorical question, "Why isn't Gowron letting his bodyguards kill Worf? I'll tell you why. Klingon honor." () 

In 2373, when Worf explained to Quark how to court Grilka, Jadzia Dax explained that Quark would know if he was successful, and "either she accepts your offer or she has her bodyguard shatter every bone in your body." Following Quark and Grilka's date, Quark noted to Worf that "her bodyguard was giving me threatening looks all night." Worf explained that "that is to be expected. The idea of a Ferengi courting a great lady is offensive." ()

In 2374, when discussing Senator Vreenak's upcoming secret visit to Deep Space 9 with Benjamin Sisko, Garak doubted that "the senator will be travelling with more than four bodyguards at the most. Two will stand watch outside the wardroom and two will stay in the landing bay." ()

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