If you installed the assets from the Genshin Characters into UT2004, these files in this System folder can be put in the System Folder of KFMod20(Or 2.5 and newer) to add Genshin Impact Bots. Don't Forget to use the KF Version from the "Animations" Folder (In either the KF Mod Folder Animations or stock UT2004, it will work either way) which is needed because the Male Models with the KF Animations. To enable, you'll have to go into KFMod20.ini (or what the mod folder is called) in the same system folder. Search for "AvailableChars" And put this section in the list and then save:

AvailableChars=Ganyu
AvailableChars=Citlali
AvailableChars=Sucrose
AvailableChars=KukiShinobu
AvailableChars=KukiNoMask
AvailableChars=Nahida
AvailableChars=RaidenShogun
AvailableChars=YaeMiko
AvailableChars=Eula
AvailableChars=Arlecchino
AvailableChars=WandererKF
AvailableChars=Firefly
AvailableChars=ZhongliKF
AvailableChars=Fischl

To make the characters available from the selection menu to be playable, you would have to edit KFMod.u under "KFGameType" and change "AvailableChars" there. But it is a much bigger hassle.