It is a curious situation to be in because it is unheard of in the world of football, but the people closest to the Brazilian usually form part of the contracts he signs. Their roles are practically symbolic, but key to the life of the players.
There are five: Jo Amancio (childhood friend), Gilmar Cebola Araujo (personap photographer and collaborator in marketing issues), Guilherem Pitta (organiser of leisure acts), Alvaro Costa (in charge of helping him adapt to Barca when he arrived) and Gustavo Almeida (advisor for the family business).
They are the key members of the group, because there are more. The eyecatching thing is that they are paid for it, 'Mundo Deportivo' say it's 11,000 euros a month. That is more than enough money for all their expenditures.
The source previously mentioned that all of them share a mansion in Paris, They spend lots of time together and they are united even through their contract, so it looks like they will stay together for ever.