Golden Trio

Golden Duo is the friendship between Harry Potter and Ron Weasley from the Harry Potter fandom.

Canon
The duo met for the first time on the Hogwarts Express when Ron was looking for Neville's lost toad, Trevor. At Hogwarts, they all got sorted into Gryffindor. While Harry and Ron were already best friends at this point.

Harry followed Ron when they left the Gryffindor tower to duel Draco Malfoy (which, in reality, was Draco attempting to get Harry and Ron into trouble, as he never showed up). They escaped caretaker Argus Filch into the third-floor corridor, where they encountered a three-headed dog, Fluffy. They quickly ran away, and only Harry noticed the dog was standing on a trap door.

On Halloween that year, Ron spent the entire day crying in the boys' bathroom, unaware that a mountain troll had been let loose. When Quirrell told everyone there was a troll in the dungeons, Harry rushed into the bathroom to save Ron. They noticed the troll there and defeated it. When the professors arrived, Harry covered for Ron, saying he had attempted to fight a troll on his own. Since then, Ron had been best friends with Harry, making this the forming time of the duo.

The duo spent their Hogwarts years together, solving mysteries during these years, and often leading to saving the school. They had some arguments, such as when Harry and Ron didn't get along when Harry was chosen for the Triwizard Tournament, but in the end, they always made up.

The two were the founding members of Dumbledore's Army, an organization that taught how to defend against the dark arts in secret as Dolores Umbridge's lessons didn't teach them anything.

In what would have been their seventh year at Hogwarts, the two didn't attend, and instead spent the year looking for Horcruxes.

Harry was already close to the Weasley Family during his school years, and he became official family members when he married Ron's younger sister, Ginny.

Fanon
The Golden Duo is an iconic part of the Harry Potter series and one of the most famous duos in all of fiction. The Golden Duo is popular in fanart and manips, as well as headcanons. On AO3, the duo has nearly 500 fanworks, but is not among the top ships for the characters as Harry Potter is one of the biggest fandoms on the website.

The Golden Duo has also inspired fanon terms for other trios in the fandom. Silver Trio nearly always refers to Ginny Weasley, Neville Longbottom and Luna Lovegood, and the combined Golden Duo and Silver Trio are often considered the main six of the fandom. Bronze Trio usually refers to Draco Malfoy, Vincent Crabbe and Gregory Goyle, although it is sometimes used to refer to other, sometimes non-canon, trios. Other terms such as the Platinum Trio are also used, but are less common and do not have agreed on characters.

Fandom
FAN FICTION

Trivia

 * Each member of the duo has a different eye color (Harry: green, Ron: blue) and a different hair color (Harry: black, Ron: red).
 * They also have a different blood status (Harry: half-blood, Ron: pure-blood).
 * The duo is never actually called the "Golden Duo" in any official material, but it is a common fanon name for the duo.