Organization XIII is a fictional group from the video game series Kingdom Hearts. Composed of thirteen members, they are primarily known for their goal of obtaining hearts and understanding the nature of emotions. Each member is a Nobodies, beings that exist after a person loses their heart, and they possess unique abilities and weapons. The organization is led by Xemnas, the first member, and each member is identified by a number and a name that reflects their past. Throughout the series, they play a significant role in the conflict between light and darkness, often opposing the main protagonist, Sora.