My fiance's sister is developmentally disabled. Physically she is fine but her reasoning and cognitive skills are developed to that of about a 6 year olds. My brothers are not in his wedding party so his sister will not be in mine... however I want her to have a role in the wedding. My two brothers will be ushers and I don't think our wedding is big enough for a third usher (120-ish people)... and she has expressed how much she hated being the guest book girl at her older brother's wedding. She's good at crafting so I was going to have her help with some DIY-projects... but she really wants an official role/title.
Any ideas on a role she can play? Or at least an official sounding title that will cover a myriad of tasks?