https://www.pcgamer.com/rainbow-six-siege-tachanka/

Tachanka is Rainbow Six Siege's least popular operator and its most popular operator. As a defender, he's mostly useless. You'll only see him selected if you're playing with someone inexperienced, or someone who's intentionally trolling the other team. Data released by Ubisoft confirms this—Tachanka has the lowest pick rate throughout the lifespan of Siege, and often the lowest win rate among defenders. By far.

But as a meme, he's beloved: members of the Siege community refer to him as "Our Lord," among other godly designations. Tachanka is the heavy, loud, unsubtle, steel-helmeted Russian in a game that's often about speed, stealth, and trickery. He's natural comedic relief in an otherwise tense, serious FPS, and Tachanka appears plenty in Siege's memes and comics, like those drawn by prolific community artist SAU-Siege.