He is portrayed by Griffin Santopietro.
Anthony can best be described as less than likable, as he is shown to be a spoiled, bratty and technology-addicted child — the complete opposite of Daniel when his father was a kid. He is proud of his LaRusso bloodline, much like his cousin, and acts in a condescending manner to anyone whom he believes are not on par in respect to wealth and success as his parents, which included Johnny and Miguel.
This is a source of tension between father and son, as Daniel has vivid memories of living in squalor in Reseda and Newark, and how Daniel's parents struggled to pay the bills. One example of this is where the LaRussos are at a party hosted by their country club, and Anthony is seen by himself playing a violent game on his tablet while other kids are playing in the pool or watching a magician do tricks; Daniel asks his son if he wants to go to the bar with him to get a (soft) drink, to which Anthony rudely tells his father to bring it to him. Daniel tells his wife that at Anthony's age, he would have considered himself blessed to be invited to such a party, whereas Amanda jokingly dismisses Daniel's concern as yet another story of his hardscrabble childhood in New Jersey, which she has heard multiple times.
Daniel and Amanda love their son, but are less than pleased with his attitude.
While spoiled, there are moments such as in the opening montage of Strike First where he does care about his family. Despite his preference for Martial Arts fantasy fighting games over the real thing, he does show a budding interest in karate when he watches the tournament.
Anthony has a small role. He is known to be spoiled as he spends too much time playing video games, and does not care about karate. However, he does show interest in karate while he is at the All Valley tournament.
He has an even smaller role. He is first shown in the kitchen where Daniel asks him to join Miyagi-Do Karate instead of going to summer camp, but he refuses as he does not want to do the chores as part of the training.
The morning after the party at Moon's house Daniel goes to Sam's room and notices she is not there. Anthony is the one who reports that Sam never came home, as he walks by Daniel who asks him if he's seen Sam to which he replies "Not since yesterday when I got home from camp". However, he seems unconcerned, as he then asks him to make waffles.
Anthony arrives at Miyagi-Do Karate alongside his mother, when they walk-in on Sam teaching karate. While Amanda is confronting Sam, Anthony is shown eating a popsicle. He repeats little things that his mother says, almost enjoying the reprimand that Sam is getting. When his mother finishes speaking, he tells Sam that he is disappointed in her.
Anthony appeared in eight of the ten episodes of the first season of Cobra Kai.
Anthony appeared in two of the ten episodes of the second season of Cobra Kai.
Anthony in only one of ten episodes of the third season of Cobra Kai.
- Anthony appears to be a fan of Yoo-Hoo.
- Aside from his apparent love of Yoo-Hoo, Anthony loves video games. He appears to be a fan of the PlayStation Vita. He is also seen playing a Nintendo Switch in No Mercy.
- According to a conversation between Daniel and Amanda, Anthony's conception was unplanned, with apparently him being conceived during an "incident on the mat".
- Anthony seems to be the antithesis of Miguel Diaz, who lives in a small apartment, but behaves respectfully to adults and is appreciative of the seldom times he gets a favor or gift. Daniel's bond with Robby can be viewed as the bond Daniel wishes he had with Anthony.