To make your story "active" you'll have to give your Characters accounts.
Whether they have accounts or not, it can be good practice to create a character map which shows the relationship between Characters. Just add Characters, connect them and label the links.
Example character map:
The anchor button
Wherever you see the anchor icon above a text area you can use it to link to other project elements. Here in the Index Card, all of the links are internal and allow for easy jumping to the elements that you need to reference (see below).