I have looked into the item system. Items can only be used in combat, there are 2 different types of items, some heals all characters and some are single target. The single target functions the same way as actions (left click to select the item and right click on the target you want to use the item on). The "all team" items instantly are consumed and activated when left clicking on it. Note that items can only be used it combat. I hope this helps! :)
