Along the journey of Kingdom Hearts SOS, several Final Fantasy characters have made appearances. In Black Coats, many of these characters are also dubbed "Children of Cosmos," and are the key to sealing the portal of the void.
| Character | Origin | Appeared in | Story |
|---|---|---|---|
| Fang | FF XIII | The Outback | Fang first appeared in The Outback as a bodyguard for Mcleach. She worked for him as he had information on the whereabouts of Vanille. After she defected from his negative influence, she traveled about until she came across Olumpus Coliseum. She lost in the first round to Karina. |
| Vincent | FF VII | Beasts Castle | |
| Gilgamesh | FF | Camelot
The Caribbean |
|
| Shadow | FF VI | Arendelle | |
| Red XIII | FF VII | Native Grounds | |
| Laguna | FF VIII | Atlantis | |
| Faris | FF V | Treasure Planet | |
| Balthier | FF XII | The Caribbean | |
| Zidane | FF IX | Neverland | |
| Jecht | FF X | Olympus Coliseum | |
| Noctis | FF XV | Sanctuary | |
| Prompto | FF XV | Sanctuary | |
| ???? | FF | Sanctuary | |
| ???? | FF | Halloweentown | |
| ???? | FF | Prydain |