How can I reference objects from a different Asset Bundle ?

We’ve been developing an event system workflow to improve development time by creating transitions and games using a chain of events. But this workflow has been problematic when working with the project’s characters since each one of them will be inside their own asset bundle, which prevents direct references to be setup from scripts/components that are in a different bundle. This has driven us to create extra script that are used as indirect references to those characters, therefore, increasing the development time and complicating the workflow. We’ve been searching for a way to reference objects from different asset bundles, but we haven’t been able to, does anyone know a way of achieving this ?