Monarch's Regalia

Monarch's Regalia (照臨のレガリア) is a set of four interconnected artifacts supposedly in possession of Calvard's former monarchy. They were first mentioned in the book series "Three & Nine" found in and properly introduced in.

Background
The Monarch's Regalia consists of four pieces of equipment. First, a golden mask engraved with the relief of a crown that is capable of generating a gravitational field in which it can increase and decrease the gravity. Second, a golden armour covering the entire body to absorb the gravity of the weapon it is attacked by. Third, a golden sceptre, spherical near the top, transmits a powerful gravitational wave to the affected part. Fourth, the orb of crows assigns the target and distinguishes the effect of the gravitational field.

Usage
The Regalia was used by the Emperor, who used their gravity manipulation effects in combat.