This sounds to me like something that would work better as a Linked field to a separate table, called “People” or “Team” or whatever the group of 4 people is.
You’d first create the new table and add each person, then add an email field and assign emails for each person. Then on the original table, you’d create the linked field, allowing for multiple records. Then you would right-click on this new Linked field, and choose “Add lookup fields”, adding the email field from the other table. This would pull in email addresses, based on who was selected in the Linked field. If multiple people were selected, the formatting would look like
firstname.lastname@example.org, email@example.com which should work for email automations.
Let me know if that helps.