Suta puranikaru –
Suta Puranika, a Shudra, was an expert on Puranas. The respect he enjoyed among the Brahmin sages was extraordinary. They would welcome him and offer him a seat meant for a teacher and would listen to his discourses on bhakti, philosophy, etc.
We observe that the Suta Puranik’s name will appear in all the Stories. Because he is the one who tell all the stories to others based on discussions of earlier episodes.