I thought it was interesting that French negotiator Talleyrand was the first to help raise Brazil up to the status of being a kingdom in 1815 but I don't know enough about the period or the Napoleonic wars to really make a judgement about how significant this little tidbit was. What are the main reasons for Brazilian independence?
Also related to this was the Portuguese Royal Family changing the Portuguese capital from Lisbon to Rio de Janeiro. This was done to avoid Napoleon conquering the Portuguese capital. When the Portuguese RF was preparing to come back to Lisbon, the Brazilian elite didn't want to lose power and losing an "European Capital" in their territory, which led to an rising will to gain independence.