Sien is an ancient God of Communication who hosts an international radio show that airs all over the world which is known as Iistoria. He is whimsical and extroverted, speaking in an energetic voice (unless the mood calls for being serious), and prefers to be informal when hosting the show. It shows that he enjoys every moment of reporting, even though he has done it for millennia. 

Overall - Think Present Mic from My Hero Academia.

Notes: Iistoria is pronounced “Ee-store-ee-ah”

Sien is pronounced “See-en”