Is there a way to add more inclusive and diverse characters?

There are companies that provide a wider variety of cut-out characters than Articulate does. For example: eLearningArt - 50,000+ eLearning templates, characters and images 

When there are specific requirements for what a character should look like and/or wear, your company or the client will probably have to pay for stock photos—or possibly even pay to have photos taken that meet those requirements.