Katsu was a Magic Constructor of notable repute across the Universe.
Originally, the profession of Construction Mage was rare, and becoming one was even more difficult, not to mention that among those who passed the grueling tests of the Collapse God, there was a group frequently responsible for various "disastrous architectures," the Stone People.
These disastrous buildings were not poorly constructed; on the contrary, they often caused serious incidents due to their excessively high quality, such as glasshouses that couldn't be opened, war fortresses that sealed their own people inside, and floating cities that couldn't descend but could fly for a thousand years…
Being grouped together with these Stone People as a fellow Construction Mage was embarrassing for Katsu, especially since he was a noble "Arcane Person."
