The Seven Guardians of Light are a collection of Keyblade wielders who band together to take on and fight Master Xehanort and his darknesses in the upcoming Keyblade War and attempting to create they keyblade in the process they serve as the main protagonists of Kingdom Hearts 3D: Dream Drop Distance and Kingdom Hearts III. It's main members are King Mickey, Sora, Riku, Kairi, Aqua, Ventus and Lea. Terra, Roxas and Xion are additional members who join the others later on, while Donald Duck and Goofy are named honorary members by Master Yen Sid and the Riku Replica lends his assistance to Riku during the War.
Terra - His body was possessed by Master Xehanort as Terra-Xehanort joining the organization but with Sora's help Terra is able to expel Xehanort's heart from his body and is able to become himself once again, he joins Aqua and Ventus as a Guardian of Light.
Roxas - Sora's nobody, as a result from a replica created by Vexen (with help from Saïx supported by research from Ansem the Wise, Roxas became whole and joined the Guardians of Light in fighting off the Organization.
Xion - Brought back by Master Xehanort (but secretly Saïx helped bring her back in atoning for his past misdeeds) to fill a spot in the organization against the guardians of light but when Roxas calling from Sora's heart causes her to regain her memories she defects from the organization and joining the Guardians of Light helping Lea and Kairi fight Saix and Xemnas.
Donald Duck - does not possess a Keyblade also does not participate in the clash against the Darknesses but nonetheless named an honorary member and helps Sora defeat Master Xehanort.
Goofy - Like Donald does not posses a Keyblade nor participates in the clash against the organization but nonetheless is named an honorary member and helps Sora defeat Master Xehanort.
Riku Replica - gave his assistance to Riku in helping defeat Dark Riku before leaving a vessel for Naminé to use.
The seven guardians of light was created by Yen Sid when Master Xehanort makes his return as a complete person, seeking to forge the χ-blade with seven lights and thirteen darknesses in order to summon Kingdom Hearts. He intends to make Sora his final vessel for the organization but his plan is stopped by Riku, Mickey, Lea, Goofy and Donald forcing the incomplete Organization to retreat.
As Sora travels with Donald and Goofy across worlds to reclaim his lost power, Kairi and Lea train in the Secret Forest. Riku and Mickey search the Realm of Darkness to find Aqua though the find her corrupted by darkness, Sora however manages to rescue all of them and Aqua is brought back to the realm of light, Aqua has Sora accompany her to the Land of Departure to reawaken Ventus. After Kairi and Lea finish their training they all gather at Master Yen Sid's tower where they reaquaint with each other and Yen Sid has them rest before the final battle with Xehanort and the Organization.
After defeating hordes of heartless, nobodies and unversed, the guardians of light would confront Master Xehanort and the thirteen seekers of darkness at the crossroads of the Keyblade graveyard Using his Keyblade, he creates the Skein of Severance. And one by one the guardians would face off the seekers of darkness; Mickey facing Marluxia, Luxord and Larxene, Riku facing Dark Riku and Xigbar, Aqua and Ventus facing Vanitas and Terra-Xehanort and Kairi and Lea facing Saïx and a hooded Xion, during the battle Sora would come to assist the groups and one by one the seekers of darkness would fall freeing Luxord, Larxene, Marluxia to be recompleted as the formers human self, Elrena and Lauriam, the Riku Replica expelling Dark Riku's heart from his replica body leaving it for Naminé to use to be collected by Demyx following the battle, Ventus and Aqua managed to strike down Vanitas before Terra manages to reclaim his body from Xehanort, Saïx would try to jog Xion's memories to restore her to normal before IenzoVexen and Ansem the Wise manage to revive Roxas in a replica body to protect his friends from Xemnas, outnumbered Xemnas kidnaps Kairi as insurance, while Roxas, Xion and Sora defeat Saïx who has a reunion with Lea before being recompleted as Isa.
Sora manages to reach the top joining Mickey and Riku and manages to defeat, Young Xehanort, Xemnas and Ansem producing twelve keys, bringing out Kairi he strikes her down in order to motivate Sora to clash with him. Although Sora feels defeated, the other guardians along with Donald and Goofy give him reassurance with Xion reassuring Sora Kairi is safe within her heart Riku and Mickey regroup and explains that Xehanort is a portal through time, and while the other Guardians try to hold off Kingdom hearts, Sora opens a portal around Xehanort, transporting him, Xehanort, Donald and Goofy to Scala ad Caelum.
After Sora manages to defeat Master Xehanort, the other guardians travel through Kingdom Hearts to Sora, Terra begins to confront Xehanort and while Aqua attempts to stop him, thinking he is intending to get revenge on Xehanort for what he did, he reassures he wont Eraqus appears before Xehanort out of his and convinces him to surrender the χ-blade to Sora, stating that while it is too late for the two of them it wasn't for the guardians, Xehanort hands the χ-blade to Sora before departing with Eraquas to Kingdom Hearts and the guardians use their light to close it and are all transported back to the Keyblade Graveyard ending the Keyblade war.
While the Keyblade War had come to an end, Sora uses the power of waking once more of saving Kairi but at the cost of being lost forever. After he rescues her all of the members alongside a recompleted Isa, Hayner, Pence, Olette, Namine all gather at Destiny Islands to celebrate they all witness Sora spend one last moment with Kairi before dissapearing. A year later the group continues to search for Sora.