Lennard and Bryon had their respective Emperor Ranked Weapons. However, these weren't the standard Emperor Ranked Weapons. Unlike standard Emperor Ranked Weapons, these weapons weren't formed of some mythical grade metal.
In fact, those weapons were made of standard materials. However, these were very special because these weapons were the Natal Weapons of the two warriors.
Natal Weapons were those weapons that were innately connected to their master. These weapons were made of standard materials and were regularly infused with the owner's Ardor and Spirit. These weapons grew alongside its master.
However, not just anyone could possess a Natal Weapon. There was a strict requirement to obtain one.
Firstly, the owner had to possess very great insight into that particular field. Secondly, they had to reach the King Rank at the least. Thirdly, they had to nourish the weapon with their Spirit and Ardor.