We have a number of custom roles in Canvas, many that are built off of the teacher role but with more restrictions (EX. "Paraeducator").
When you look up a user in Canvas and scroll down to their enrollments, you only see: Teacher, Student, or Observer. To know which specific enrollment a user has, you need to open the course and review the People screen. I get a lot of emails from panicked secretaries thinking they've done something wrong when they added a Paraeducator to a course and later see "Teacher" under the enrollments the profile screen. Displaying the custom role, rather than the parent role would make it much easier to find accurate information about the assigned role.