The design, manufacture, maintenance, and modification of the mechas in the Mythical Army are vast projects that touch upon various aspects. As the Empire's top royal unit, the most advanced and expensive weapons are prioritized for the Mythical Army. After being tested and used by the army, they are gradually equipped to other units. In a sense, the Mythical Army is the core of the Imperial Army, and the core research lab that sits within this core is of paramount importance. If Fatty can enter the core lab and become the leading figure of the Mythical Army's mecha research lab, then all matters related to the development and maintenance of mechas and other weapons for the Mythical Army would be under his control. If Reinhardt does not heed the words of such a person, whose words would he listen to?