Exactly the same as with any other ".pak" mod, drop inside "Steam\steamapps\common\Tales of Arise\Arise\Content\Paks\~mods". Create if nonexistent.

Kisara's starting mace is now darker and more metallic. Pretty quick and effective change, phew...

Edited Radiant Shield (the dark variant of the default one). I wasn't happy at all with the first try on the Shield (why I didn't upload it at first), but after going with a rusted/worn look I actually prefer it to vanilla ;)