From Divinity Engine Wiki
- call TriggerRegisterForCharacter((TRIGGERGUID)_Trigger, (CHARACTERGUID)_Character)
- If you register a trigger for a character while the character is currently inside the trigger, a CharacterEnteredTrigger CharacterLeftTrigger event will also be thrown. This even holds for characters placed in the editor and triggers registered in the INIT section of a story goal that gets initialised once the RegionStarted event for its containing level has executed.
- Event triggers are automatically registered for all characters by the engine and should not be manually registered/unregistered.