Chandler McCann is a recurring antagonist on The Loud House. He is Lincoln's arch-nemesis and classmate who is introduced as the most popular student at Royal Woods Elementary, but in actuality is a very conceited boy and a freeloader.
In his debut episode, "The Waiting Game" in the first season, he invites all of Lincoln and Clyde's classmates to his birthday party that he annually throws at the sewage plant where his father works, but ignores Lincoln and Clyde. Then, when he sees Lincoln getting free food and tokens at Gus' Games and Grub because he helped Lori get a job there, Chandler gets Lincoln to do all sorts of favors for him, taking advantage of Lori's generosity towards her brother. He eventually does invite Lincoln and Clyde to his party, but in the end, Lincoln, seeing that his sister has to work overtime due to all the favors Chandler tricked him into doing it, decides to skip out on Chandler's party and cover for Lori at the restaurant so she can go to the school dance with Bobby.
Two seasons later, in "Jeers for Fears", Chandler and his friends, Trent and Richie, plan on checking out the Royal Woods House of Terror. Chandler believes that Lincoln and Clyde are too chicken to visit the attraction themselves, but when Lincoln says that he and Clyde plan to go there themselves, Chandler opts to tag along. When they eventually do go to the House of Terrors, however, Chandler and his two companions ultimately are the ones who end up running out of the house in fear first, as it turned out that they were too scared by the House of Terrors. Chandler then sees that Lincoln and Clyde successfully made it all the way through the House of Terrors (unaware that the pair were actually just as frightened as he was), and worries that they might rub in his shame at school. But Lincoln and Clyde tell him that they won't do that to him, and as a result, he seemingly comes to respect them a lot more.
However, in the next season's "Wheel and Deal", Chandler is back to being in an antagonistic role, this time appearing as one of Lincoln and Lana's rivals in the Royal Woods soapbox derby. He is only keen on winning the race and doesn't seem to care about getting the opportunity to meet Bobbie Fletcher like Lana wants to. Seeing how much better his and the other race-cars are over the one Lana has built leads Lincoln and his friends to try to cheat in Lana's favor during the race.
As of the show's fifth season, in which he has made more appearances than previous seasons, Chandler is now one of Lincoln's classmates in Mr. Bolhofner's class at Royal Woods Middle School (due to Lincoln being unable to get a spot in Mrs. Salter's class with his friends because there's no room left). He has unfortunately become even more of a jerk to Lincoln and his friends than before, actively bullying Lincoln and getting him in trouble for his antics, and also mocking Zach Gurdle for believing in aliens. Perhaps for this reason, he no longer seems to be popular with his fellow students like he was in elementary school. He is most prominently featured in "Broadcast Blues", in which he convinces Lincoln and his friends to let him join the school's morning news program by buying them new equipment, and then uses his position on the crew as an excuse to bully other students. In the end, Lincoln and his friends get him to quit when they find out that he's been secretly selling stuff that washed up in his dad's sewage plant to afford the equipment and threaten to reveal this to everyone.
Outside of the show itself, Chandler also appears in the book Campaign Chaos!, in which he is Clyde's rival in the election for Royals Woods Elementary School's treasurer. He also appears in episode 13 of the Listen Out Loud podcast, in which he snags the table meant for Lincoln and Clyde, and wins a chance to spin the Wheel of Pizza at Gus' Games and Grub.