The evolution of amicus curiae ruled it as enigmatic figure, on which hung many doubts.Such characteristics confirm its relevance to the law researcher due to involve extensive facets of an institute that today, by Article 138 of the CPC/2015, requires study and practice consolidation.After this regulation, there Subscription Box was wide expansion of its horizons of observation, of a LNL Switch Kit figure that was once imbued with vast obscurity.Thus, considering the specificities of the law, this essay aims to present the institute and its peculiarities to, at the end, substantiate the possibility of acting in defense of (so essential) personality rights.