Whether they picked up a random notebook or summoned a demon by accident, the protagonists in these series have formed a contract or bond with some of the most powerful supernatural companions in anime.
Often the partnership dynamics are begrudging and unexpected, like the case of Shinichi and Migi from Parasyte: the Maxim whose very existence depends on one another’s survival. On the other hand, there can also be a beautifully loyal and admiring fellowship, like the four dragons from Yona of the Dawn.
No matter the means of their collaboration, however, both parties always find a balance in order to achieve their goal, and eventually trust one another. With demons, gods, and spirits to consider, how does one determine the most powerful? Is strength truly in numbers, or is it purely raw strength that renders one most dangerous? Whatever the answer, the main characters of these respective series can feel rest assured that they are protected by some absurdly powerful entities.