Bert is a minor character that joins the Cobra Kai Dojo in the TV series The Cobra Kai.
Bert along with several teenagers join the Cobra Kai Dojo after Cobra Kai student Miguel Diaz beats up Kyler and his gang in their school cafeteria. On his first day Bert along with the rest of the new students are roasted by the sensei Johnny Lawrence. While Johnny's insult causes several students to quit, Bert is not among the students that quit.
On the morning of the All Valley Karate Tournament Bert tells Cobra Kai students Aisha and Hawk that he does not think Johnny will come because the previous night he saw Johnny peeing on his car and ranting, and Johnny himself ranted to him. Johnny however shows up. Bert loses to his opponent in the tournament in the match before the quarter-finals. However, all the other Cobras, to include Johnny, think it was lopsided, as Bert was paired against a much bigger kid. After Miguel wins the tournament Bert along with the other students celebrate with him.
Bert has a much smaller role. He is still a student at the Cobra Kai. When Johnny punishes Aisha and the others for goofing off by teaching them about concrete, Bert is seen mixing the concrete with the others (but not one of the boys made to push the cement drum). In Episode 9 he is seen welcoming Raymond, also known as Stingray. When the School brawl occurs Bert fights Miyagi-Do Karate student Nathaniel. Nathaniel has more hits but mid-fight Bert manages to break his glasses, but this causes Nathaniel to tackle him to the ground and repeatedly punch him. However, a security guard arrive and picks up Nathaniel. Bert then tries to attack him but the security guard grabs his hand and takes them away (possibly to the principal's office).
While Bert isn't present when Johnny's sensei John Kreese takes over that could be attributed to him possibly being in the principal's office because of his fight with Nathaniel. Since he was more than willing to attack a Miyagi-Do student it can be implied that Bert has been corrupted by Kreese's ruthless teachings and is on his side. Another reason why he is not seen in the night class of Cobra Kai was because Bert doesn't support Kreese unethical teachings.
- Similar to Aisha Robinson, Bert not being present when Kreese stole the Cobra Kai Dojo from Johnny comes down to 2 reasons: 1) Bert doesn't support Kreese unethical teachings 2) Bert supports Kreese but isn't present when he reveals to Johnny that the dojo in now his.