We would need a friendly avatar. It should be unisex. It should be friendly, happy, jovial, smiling, but serious. Like a friendly, slim version of the Michelin Man. Not a "comic" avatar. The avatar should be monocromatic, i.e. have one color which users would be able to change. It should have eyes and a smile, maybe nose, but not hair or ears. The avatar should be able to hold hands and stand on each others shoulder so that they can form a structure.