What are the Final Fantasy characters in Kingdom Hearts

Final Fantasy VI:
- Setzer Gabbiani

Final Fantasy VII:
- Cloud Strife
- Tifa Lockheart
- Sephiroth
- Yuffie Kasaragi
- Aerith Gainsborough
- Cid Highwind
- Zack Fair
- Jessi (Shop Keeper)
- Biggs (Shop Keeper)
- Wedge (Shop Keeper)

Final Fantasy VIII:
- Squall Leonheart
- Seifer Almasy
- Raijin (Goes by Rai)
- Fujin (Goes by Fuu)
- Selphie Tilmitt

Final Fantasy IX:
- Vivi Ornitier

Final Fantasy X:
- Tidus
- Wakka
- Yuna
- Rikku
- Auron
- Wantz (Shop Keeper)

Final Fantasy X-2:
- Paine

Miscellaneous:
- Moogles

Final Fantasy characters are in the Kingom Hearts games. Since the Kingdom Hearts games' main characters (not including Donald/Goofy) Sora, Riku, and Kairi have sort of a manga style that's similar to the Final Fantasy characters, several of the characters from Final Fantasy (particularly FFVII and FFX) were featured in the game (including Cloud Strife, Leon (Squall), Aerith, Tidus, Wakka, Cid, Yuffie, Tifa, Sephiroth, Setzer, Auron, etc.).

Originally, in KH I, Riku, Kairi, and Sora are on an island with the FFX characters (on Destiny Islands) and run into the FFVII in a town called Twilight Town. In KH II and KH:Chain of Memories, the characters from FFVII are in a town called Hollow Bastion AKA Radiant Garden. Also in KH II, there is a character from on of the FFs named Setzer who is really good at a championship called "Struggle". Setzer, who has been the Struggle champion title holder several years, comes from a "foreign land" and battles both Seifer's gang and Hayner's gang in the Struggle competion.

In KH II, in the Underworld from the Disney movie "Hercules", he releases the soul of a character name "Auron" (who has been a standing character of the Final Fantasy series in several of the games, including FFX) to fight in the Championship against Hercules. However, Auron eventually comes to help Sora's party. Also in KH II three fairies appear to spy on the Hollow Bastion Committee for Maleficent (the antagonist). The fairies' names are Yuna, Rikku, and Paine, which are representations of the (non-fairie) major-minor characters in FFX.

And...I believe that's all. I agree with the opinion that "In order to get enough people to play a Disney RPG [Role Playing Game], they added Final Fantasy characters." Plus, by adding these characters, the plot was thickened