What is the name of the bounty hunter with the bowcaster-like rifle who wears a long coat and is seen with Vader in Episode V?

The story behind the answer

The bounty hunter standing with Vader aboard the Executor in The Empire Strikes Back is recognizable by Mandalorian armor, T‑shaped visor, braided trophies, and an EE‑3 carbine (often mistaken for a bowcaster). He’s distinct from IG‑88 (a tall skeletal droid), Dengar (bandaged head and heavy plating), and Zuckuss (an insectoid Gand in flowing robes with a different rifle).

Story-wise, he shadows the Millennium Falcon from the Star Destroyer to Cloud City, enabling Vader’s trap and Han’s carbon-freezing—hence Vader’s warning, “No disintegrations,” and the reply, “As you wish.” Developed from an early “super trooper” concept by Ralph McQuarrie and Joe Johnston and portrayed in ESB by Jeremy Bulloch, this character became a breakout fan favorite, later expanding Mandalorian lore across films, books, and series.