Cloud architecture defines three roles:

Cloud service consumer: it is used to provide different services to the consumer on demand.

Cloud service provider: here provider provides the services to meet the requirements of the user by monitoring the traffic and demands that are coming.

Cloud service Creator: here creator is used to create the services and provide the infrastructure to the user to use and give the access to the resources.

The roles that are being defined can be performed by one person or it can be performed by many people together. There can be more roles defined depending on the cloud architecture and the complexity with which it will scale.