K-4O5, functioning as a Security Droid Enforcer of the KX-series, was equipped with an electro riot baton. Serving the Galactic Empire on the planet Coruscant, this droid escorted Cal Kestis. After Kestis quipped about a stormtrooper supposedly calling him a "terrorist" (implying the trooper said it to the droid), K-4O5 responded with a forceful punch to Kestis' abdomen. Subsequently, the droid forcibly moved the Jedi Cal Kestis to Senator Daho Sejan. Later, the droid surprised Kestis during his escape from Sejan, throwing him from a rooftop, which led to a confrontation. Ultimately, K-4O5 was defeated and destroyed in combat by Kestis and Bode Akuna.
Cal Kestis, a fugitive Jedi Knight, was apprehended by K-4O5 from Bode Akuna. Akuna, a member of Kestis's crew, was disguised as a captain within the Coruscant Security Force. The droid instructed Akuna to remain, in an attempt to deviate from their established plan; however, Akuna refused. K-4O5 escorted Kestis and Akuna into an elevator containing a stormtrooper, where Kestis made a disrespectful comment towards the droid. K-4O5 reacted by punching Kestis, then exited the elevator, dragging his captive along.
Akuna cautioned the droid about the excessive force being used against Kestis. K-4O5 responded by stating that "the senator" had only specified that Kestis needed to remain alive, which he was. Subsequently, K-4O5 presented Kestis to Imperial senator Daho Sejan. Sejan inquired about the security of the sector, which K-4O5 confirmed before departing with Akuna.
Kestis eventually managed to escape, only to be ambushed by K-4O5 as he emerged from a confined space. The security droid seized Kestis and threw him into a pit below. After jumping down to engage the Jedi, K-4O5 swung at Kestis, who dodged the attack. Akuna then joined the fray. Together, they overcame K-4O5, resulting in the droid's destruction.
K-4O5 was a Security Droid Enforcer of the KX-series, manufactured by Arakyd Industries, and featured tan plating. The droid was equipped with white sensors and had a height of 2.16 meters. K-4O5 demonstrated respect towards Daho Sejan and assisted him by delivering Kestis. The droid showed a lack of concern for Kestis's well-being beyond the bare minimum required and was unaffected by Akuna's verbal rebuke regarding his treatment of Kestis.
Akuna's interaction with K-4O5 led him to anticipate their eventual confrontation. After defeating K-4O5, Akuna commented that the droid had disliked Kestis, to which Kestis responded by suggesting that the droid had also disliked Akuna.