While it is still early days for Crisis Core: Final Fantasy VII Reunion, people are already beginning to customize the game. At the moment, only items that change peoples’ appearance tend to be appearing. For example, Ninjagrime released two mods on Nexus Mods that allow Zack to cosplay as Cloud in Crisis Core, with the Advent Children and Remake outfits available to download.
Here are two screenshots Ninjagrime shared on Nexus Mods showing how the Zack Remake Cloud Outfit looks in Crisis Core.
The modder also shared a video showing it in-action.
And this is how the Final Fantasy VII Advent Children Cloud outfit looks on Zack.
Likewise, there is a second video going over how it looks, with another Aerith mod showcased at the same time.
Both of these appearance mods require the CCFF7R UTOC-PAK Patcher made by KeinZantezuken. Once that is installed, people can put the downloaded files into the SteamLibrary\steamapps\common\CCFF7R\CCFF7R\Content\Paks\~mods folder.
Crisis Core: Final Fantasy VII Reunion is available for the PS4, PS5, Switch, Xbox One, Xbox Series X, and PC. The original game appeared on the PSP.