these characters you just mentioned, are they all disney characters?
Yes
Kingdom Hearts
"Kingdom Hearts" features a mixture of familiar Disney and "Square Enix" characters, as well as several new characters designed and created by Nomura. 
what is kingdom hearts? Action role-playing video game when was it released? The series consists of thirteen games. The first "Kingdom Hearts" was announced at E3 in May 2001. who are the characters? Sora, Riku, Kairi, Donald Duck, Goofy can you please describe the storyline? The series starts with "Kingdom Hearts", where a 14-year-old boy named Sora is separated from his friends Riku and Kairi when their home Destiny Islands is consumed in darkness.
wiki:5919983
Kingdom Hearts [SEP] Disney and Square Enix characters
"Kingdom Hearts" features a mixture of familiar Disney and "Square Enix" characters, as well as several new characters designed and created by Nomura. In addition to original locations, the "Kingdom Hearts" series features many worlds from Disney films. Sora must visit these worlds and interact with various Disney characters to protect them from enemies. Often, his actions in these worlds closely follow the storylines of their respective Disney films. The main characters try not to interfere with the affairs of other worlds, as it could negatively affect the universe's order. Various "Final Fantasy" characters also make appearances within several worlds throughout the series.