Is it possible, with a chest or inventory grid to make a Pathfinder loot screen where the inventories of the dead combatants are aggregated into one window AND the source separates the grid?
The base class “Item View Slots Container Base” is used by the Inventory Grid, Item Hotbar, Item Slot Collection View and more. Some options in . . .
opsive.com
This will give you all the functionality of Drag&Drop, ItemViews, ItemActions, etc... out of the box.
All you'll need to code is placing the ItemViewSlots in the UI and linking them to each inventory.
Another approach would be to code a component that shows up multiple InventoryGrids. That might be a bit easier.