Re: Bolu
I have a village of about 50 characters. Initially they have no personality. I went through each and asked them for a wish that they want to come true. Their personalities then get developed as they work together and try to fulfill each wish.
Some of the archetypes I have are:
1. A King who is fair and only makes a promise when he can keep it. He is humble and cares about the well-being of his subordinates. He motivates the people to do the right thing, do it right, and get it done.
2. A Stylist who the villagers seek help when they want to make something prettier. She is good at comparing different designs and verbalize the difference between them, why one looks better than the other, and how to make it look even better.
3. A Historian who keeps good records and meeting minutes. She keeps track of information that people would likely forget.
4. A young Baker (kid) who is innocent and likes to be with people. She is curious and wants to do things that would help people.
5. A Village Drunk who just says whatever is in his mind.
6. A Mayor who is good at resolving conflicts.
7. A Scavenger who is good at re-purposing things and making things out of junk.
8. An Adventurer who gets bored easily and wants to do exciting things.
9. A Patrol who stays vigilant for threats and keeps the village safe.
10. A Gambler who likes to tease people and make bets.
etc...
The context of the village council is that when someone wishes for something, the wish is posted on a bulletin board. Then the villages who want to work on it come together to form a task force. The task force will discuss the wish with the villager who made the wish, brainstorm, design, and make the wish come true.
In your context, when you have something you want to brainstorm, you are the client seeking help from the consultant group. The group are the villagers who volunteered to help you. They will ask you questions to pinpoint what you want. They will give suggestions, design, and implement. In this sense they don't stay just for a brainstorming session. They stay in the task force until the project is complete.