Sora and his friends have fought many enemies over the years, such as the heartless and some Disney villains. In the Dark Seeker Saga, which consisted of nine games from the first installment to Kingdom Hearts 3, a lot of the antagonists were members of Organization XIII, a group of nobodies that were led by Master Xehanort.
Organization XIII first appeared in Chain of Memories, back in 2004. Ever since, some of the members left and were replaced by others. In total, there have been twenty members of the group. Here are some things that all fans of the series should know about each one.
20 Xion
Xion was one of the first replicas that Organization XIII used. Due to her connection to Sora and Roxas, she has the ability to wield a keyblade, which she had used to help the organization collect hearts before leaving them. She was one of the main characters in 358/2 Days and returned in Kingdom Hearts 3 after everyone she knew lost their memories of her.
19 Roxas
One of the main characters in the entire series, Roxas was the thirteenth member of the original organization. Roxas is Sora's nobody and close friends with Xion and Axel. After leaving Organization XIII at the end of 358/2 Days, he returned to Sora. Like Xion, he returned at the end of Kingdom Hearts 3 and the two now happily live in Twilight Town.
18 Larxene
Larxene was introduced as an antagonist in Chain of Memories as a cruel woman that mocked Sora and his friends. She had planned on betraying the organization before being defeated. Despite her deception, she joined the group again in Kingdom Hearts 3. She is the nobody of Elrena, a kind girl from Union X.
17 Marluxia
Marluxia is Larxene's partner in crime. In Union X, he was known as Lauriam, one of the Union leaders. After learning that his sister, Strelitzia, was murdered, he searched for the killer with Elrena, Strelitzia's best friend. The two would eventually join the organization together. Marluxia was also the main villain in Chain of Memories and was fought again in Kingdom Hearts 3.
16 Luxord
Luxord is one of the most mysterious members of the organization. Introduced in Kingdom Hearts 2, he is a gambler that cares much more about playing card games than going on missions. It is heavily theorized that he has a strong connection to Yozora and lived in Quadratum before joining the organization.
15 Demyx
Like Luxord, little is known about Demyx. He first appeared in Kingdom Hearts 2 as both a strong boss and a loveable goofball. As little is known about him, fans have come up with some insane theories surrounding his character over the years, such as the possibility of him being the Master of Masters.
14 Axel
Few members of the organization have had more character development than Axel. He was originally introduced as an antagonist in Chain of Memories and was a main character in 358/2 Days.
Like many of the original members, Axel lived in Radiant Garden prior to becoming a nobody. He had joined the organization in order to find out where his friend, a girl only known as Subject X, was. In Dream Drop Distance, it was revealed that he could wield a keyblade and used it to fight his former comrades.
13 Saix
Besides Subject X, the only friend Axel had from his childhood was Saix. While Axel turned his back on Organization XIII and made friends with characters such as Roxas, Xion, and Kairi, Saix began to resent him and became one of the group's most loyal members. However, at the end of Kingdom Hearts 3, he admitted that he was jealous of his old friend and joined him again.
12 Zexion
Before becoming a nobody, Zexion was known as Ienzo, an orphan from Radiant Garden who looked up to Ansem the Wise. Introduced in Chain of Memories, he was an antagonist in Riku's story that could create illusions. After being defeated, he regretted his actions and helped the Guardians in Kingdom Hearts 3.
11 Lexaeus
Lexaeus was a guard at Radiant Garden that worked for Ansem the Wise before turning into a nobody. He was also close friends with Zexion. When Riku defeated him in Chain of Memories, he returned to the world he guarded and assisted Ansem and Ienzo however he could.