When King first appeared in the One Piece manga, he was clearly seen with a sword on his belt.
1. King looked like he wanted to swing his sword, causing Raizo to panic
The Nine Red Baos are very strong, this was confirmed in One Piece 970. Even though they were only nine people, they were able to support Oden in facing thousands of troops of the Hundred Beasts Gang.
From King’s movements of holding the sword high above his head, one can see the similarity between his moves and KendÅ, a modern Japanese sword fighting art, developed from traditional Japanese techniques.
So, it seems that King’s sword is not just for decoration, to make his armor look cool, King may also be a talented swordsman.
2. King possesses a powerful Zoan-type devil fruit
In addition to the swordsman, the One Piece manga also revealed that King ate an Ancient Zoan-type devil fruit, the Pteranodon model.
King’s flames and wings appear to come from his race, not his devil fruit powers.
Able to fly, use swords, and use fire, King seems to have a lot of power.
3. Is King suitable to fight Zoro?
In previous arcs, if Luffy fought the strongest person, Zoro would fight the strongest right-hand man on the opposing side.
However, King is also suitable to face Luffy’s other allies.
Besides, the war against Kaido is getting bigger and bigger.