Rui bade him goodbye before sky-walking away. The blade made out of Tethered Bellhorn Steel was one of his solutions to the problem of the monsters that he hoped to handle with Project Monster Repellant.
He had commissioned a single-handed curved sword with a blade fashioned out of Tethered Bellhorn Steel. The reason for this kind of blade was rather simple, he would likely be putting himself in a situation where he would be facing multiple threats omnidirectionally, thus he needed a blade whose application was flexible and versatile and could be rapidly adjusted to fit his situation.
In this regard, slashing was a more desirable means of attacking than stabbing or thrusting. The former was much more flexible as it had a large number of directions and angles of attack, and was less committal allowing the swordsman to return back to a guarded stance swiftly and easily. Stabbing and thrusting were more lethal, yet also required more commitment from the swordsman.