Read more about K-2SO at: Wikipedia

Official Site: Lucasfilm

K-2SO (also referred to as K2 or Kay-Tuesso) is a droid character in the Star Wars franchise, first appearing in the 2016 film Rogue One. He is a CGI character voiced and performed through motion capture by Alan Tudyk. In the film, K-2SO is a KX-series security droid originally created by the Empire.

K-2SO was part of the initial line-up of spies in John Knoll's pitch for Rogue One, as an Imperial protocol droid. Designs for the character's look focused on giving him both a unique silhouette as well as keeping him in tune with the Imperial aesthetic from A New Hope. References of Imperial designs were used, and the character's chest plate draws on the armor of an AT-AT commander in The Empire Strikes Back. Unused designs by Ralph McQuarrie for droids and stormtrooper helmets would influence his eventual headshape. Originally designed as a "black protocol droid", further story development and drafts that "accentuated" his ties to the Empire turned K-2SO into an Imperial security droid. His laid back personality became a "visually amusing" contrast to his "towering, monolithic form". Director Gareth Edwards wanted K-2SO to be "appealing" despite his figure, and designs continued to reflect elements of his personality with his form; his stoop is one example, showing his "casual kind of personality".

K-2SO is voiced and portrayed via motion capture by Alan Tudyk. Tudyk initially turned down the role as he felt he would be busy with Con Man, a webseries he had crowdfunded. The droid's height meant Tudyk had to wear tall stilts to perform the character, which he had difficulty taking off and thus would take to the bathroom. Tudyk called the stiltwalking the most challenging part of playing the droid, finding further difficulty in walking over things like sand and running. K-2, when rendered, had a slightly hunched over look. So, in order to prevent his own slouch from being added to the character, Tudyk had to force himself to stand up straight. With K-2SO having an inanimate face, Tudyk tried to keep "emotion" in his body and his movement. The actor worked with a mask teacher, Orlando Pabotoy.

Tudyk auditioned with three different accents: an American accent, a mid-Atlantic accent, and an English accent. The English accent was chosen due to the character's Imperial roots, and as he was a droid Tudyk gave him a more formal "proper" accent. Tudyk improvised or altered many of K-2SO's lines.

K-2SO has not been a contender in any CBUB matches.