Gremlin : Combine 2 or more vertices without an edge between them in Cosmos DB Gremlin API

Question

Suppose I have a vertex Employee and a vertex Department. Employee has a property departmentId but there is no edge between these 2 vertices, can I project departmentName along with employeeName??

g.addV('employee').
  property('id', 1).
  property('name', 'A').
  property('departmentId', 1)

g.addV('department').
  property('id', 1).
  property('name', 'HR')

Answer 1

I still think this is a bad design, and the performance here will be bad.

g.V().hasLabel('employee').as('e').
  project('name', 'department name').
    by('name').
    by(V().hasLabel('department').
      has('_id', select('e').
        values('departmentId')).values('name'))

example: https://gremlify.com/kudcz61i5j

Maybe this will have better performance:

g.V().hasLabel('department', 'employee').
  group().by(coalesce(
      hasLabel('department').values('_id'),
      hasLabel('employee').values('departmentId')
    )).
    by(fold().as('group').unfold().
      hasLabel('employee').
      project('name', 'department name').
        by('name').
        by(select('group').unfold().
          hasLabel('department').values('name')).
      fold())

example: https://gremlify.com/nndmumlshmo