In order to ensure Vongola's prosperity, Vongola's senior officials used an ancient secret method to summon souls from another world and became the ones behind the scenes.
Without being discovered by the protagonist and others, the person behind the scenes needs to 'restore' the world and let it develop towards the established angle, otherwise the anime "Tutor" will cease to exist.
Hidden behind the scenes, waiting for the time to truly stand in front of everyone.
[PS: In fact, this article is written in a light-hearted way, although the text seems very serious = =... Also, this guy is definitely not a Mary Sue! I overthrew 27 with a goal and a plan!