- "I don't think so man. Look at your face, looks like you already got your ass beat!"
- ―Cruz to Johnny Lawrence[src]
Cruz is a minor antagonist both in the Season 1 and 2 and a very minor antagonist in Season 3 of Cobra Kai He's a small-time criminal with Trey and, newly Derek as his companions and formerly, Robby Keene as his companions.
Cruz, along with Trey, appears as a friend and partner-in-crime of Robby. They can be seen working with Robby to scam out a laptop from a tech store, with intentions to sell it to get money for drugs. Later, Cruz and Trey are hanging out at Robby's apartment doing drugs and watching adult content, when the trio gets confronted by Johnny Lawrence.
After Robby lands a job at the LaRusso Auto Group, Cruz and Trey meet him at a café, asking him to obtain the security code of the dealership's garage so they can steal some car parts. While the deal is being agreed on at first, Robby, eventually changes his mind and refuses to give them the passcode when the trio meets in front of the office, resulting in Cruz and Trey attacking Robby, who attempts to fight them with his new karate skills. Eventually they corner him, but quickly run away upon discovering that their activities have been recorded on a security camera.
Cruz and Trey appear again when they are pickpocketing from visitors at the Beach Country Club. Robby stumbles upon their stash of stolen wallets under a staircase, after which he confronts them, asking them to return the stolen items to their owners. When Robby attempts to fight them, he gets knocked out by a new member of their gang, who hits Robby to the head with a paddle. Cruz pulls out a knife and attempts to attack Robby, right before Daniel LaRusso intervenes and knocks the trio out, thus saving Robby from the thugs. Cruz and his associates were caught by police and have gone to jail, as seen in Ep. 2 for the crimes committed.
Cruz appears when he and Trey are visited in prison by Daniel & Johnny in the hopes of telling them where Robby could be as Robby was on the run from an arrest warrant during Aftermath. However, Cruz & Trey both mock Johnny's bruises from Aftermath when he was beaten up by two Hispanic guys in a parking lot and Johnny, in return, punches Cruz in the nose. The crook attempts to snitch on him to an officer and mocks him again but an officer doesn't care as they think he deserves it and Johnny repeats the blow. In fear, Trey defends Cruz and says to Johnny to calm down and tells both him and Daniel that they used to do scamming at Tech Town and that Robby knows how to get by around there. Daniel and Johnny leave the prison and Cruz complains about bleeding on his nose and Trey asks him if he's crying.