Sounds like you're looking for CiviCRM Views Token.
This is a Drupal module which allows you to place a token in your CiviMail that will be replaced with the output of a Drupal View.
To use it:
Install and enable CiviCRM Views Token
Build your view of contacts in Drupal - keep the output simple, eg a table or an unformatted list.
In your CiviMail edit ...
It appears the View you are using is starting from the entity CiviCRM Relationship. This is unusual in my experience. I would be building a View based on Contacts and then adding the Related Contacts by using the View Relationships to pull them in.