"Former FSB deep cover agent; captured and tortured at the hands of "Mr. Z". Face disfigured, diagnosed with acute dissociative disorder. Remains a methodical, calculating soldier. Reassigned to Spetsnaz to utilize skill-set."
Nikto appears in Call of Duty: Mobile and was added on May 15, 2020, during Season 6 Once Upon A Time In Rust as part of Void Draw with Cordite Zero G. 
Although yet to make a physical appearance in the Battle pass comics, Nikto is mentioned by Templar, apparently he is contacted to be their extraction for their mission to Alaska. If they succeed in their mission, then Nikto would cover their exit plan.
Call of Duty: Modern Warfare
Nikto's bio in Modern Warfare and Warzone.
Nikto Operator Card.
Nikto's default operator skin, Fixer.
Nikto as he appears in Season One promotional material.
Nikto (Russian: Никто) roughly translates to "Nobody" in English.
Nikto frequently refers to himself as a group in callouts. Often time using phrases such as "We're reloading" or "We're good."
Nikto's Scarecrow skin featured in Brainless Operator Bundle is a reference to the character of the same name in the movie The Wizard of Oz.
In Nikto's preview image for his finishing move "The Fix" he is shown wearing a vastly different outfit. It resembles a more traditional combat uniform instead of his flight suit. The chest rig in the icon also is entirely different and appears to have the US flag patch on the chest.