Characters from the unpublished work Kingdom Hearts Broken Futures. Most of the characters are the same age that they were in Kingdom Hearts II.
SoraThe Hero of our story. A 15-year-old boy from Destiny Islands, he's just defeated Xehanort in the main timeline. Now trapped in an alternate timeline, he has 24 hours to defeat Master Xehanort or else disappear forever and let Xehanort rule over all worlds and have his second Keyblade War. Sora is one of two characters* from the main timeline, although Master Xehanort and (the dethroned) Mickey Mouse are also aware of it.
RikuSora's best friend in the main timeline, he's now just one of thirteen spare bodies that Xehanort can possess, Pain/Pein-style. This was a result of him giving into the darkness, in the same way that he did in the first Kingdom Hearts - but without Sora to save him, he just became Ansem's and later Master Xehanort's permanent Meat Puppet.
KairiSora's... umm, other best friend and one of the seven Princesses of Heart. In this continuity, she's become a Keyblade Master and Mickey's right-hand woman. She's also sought after by Xehanort in order to complete the God Blade.
Ansem, Seeker of Darkness
Captain Jack Sparrow
Kermit the Frog