When dealing with a complex product, what is best defined as a secondary persona?

A secondary persona is a type of persona that represents another user of the primary interface who

can be accommodated as long as the targeted persona’s experience is not compromised. A

secondary persona is not the main focus of the product design, but still has some needs and

expectations that should be considered. A secondary persona can help to identify additional

features, functionalities, or scenarios that can enhance the product value and usability, without

sacrificing the primary persona’s satisfaction.

Reference:

Design Thinking - Scaled Agile Framework

Personas - Scaled Agile Framework

When dealing with a complex product, a secondary persona could be best defined as what?