Surrounded By Main Characters, I Was the Real Main Character All Along

The Qilin's Descendant that stops the destruction of the world at the hands of the Four Evil Omens with the Four Sacred Beast Guardians. The Vampire Princess that prevents the Blood Lord from a war with the humans. The Onmyoji Genius who stops the evil demons from invading the world. I am none of these people. I am the friend character of these three protagonists and this is my story.