Ryū (竜,Ryū?) is Japanese for "dragon" and can be found in the Japanese term for "dinosaur", kyōryū (恐竜,kyōryū?).
Strengths and Weaknesses
The major strength of this fruit is that it allows the user to transform into an allosaurus, a large and powerful theropod dinosaur from the prehistoric era, as a carnivorous Ancient Zoan the fruit grants them features much better suited for close combat than basic Zoans such as sharp teeth and claws. As is the case with every other Zoan ability, the user can also become a human-animal hybrid at will.
While in full allosaurus form, Drake's own size increases, making him bigger than a Pacifista. He is also granted powerful sharp teeth and jaws that are strong enough to bite through a Pacifista's heavy armor, which is said to be stronger than steel. His tail is also a powerful weapon, capable of slamming people with great force. As with all Ancient zoans, Drake's fruit grants him much greater durability than regular zoan users, as seen in the anime he is durable enough to withstand several powerful attacks such as Sanji's kicks without significant injury.
In Human-Beast allosaurus form, Drake becomes smaller, but still relatively large, and is capable of wielding his signature weapons for melee combat.
This fruit has no known weaknesses, aside from the standard Devil Fruit weaknesses.
In Beast form, Drake's fighting style mainly revolves around biting. Should he capture his target in-between his maws, he will crunch and then spit them down, using Busoshoku Haki if they happen to be a Logia. He may also attempt to use his tail for surprise attacks, using his bites as a feint.
In Human-Beast form, Drake makes use of the immense physical boost granted by his fruit to greatly enhance the power of his dual-wielding axe-sword combat abilities, being capable of dealing damage comparable to Monkey D. Luffy's Kong Gun to knock out even a Giant-like creature in one hit.
As of Chapter 998, Drake's allosaurus form now features a row of spike-shaped protrusions running along its spine, a detail that was not present in its design beforehand. This is not the first time a Zoan form undergoes an artistic update in the series' run; Page One's spinosaurus form already went through two different revisions ever since its debut.
The depiction of Drake's full-beast form in his first appearance is largely based on the outdated model of the Allosaurus and other theropods that became popular in the 20th century and have since been corrected. Oda's model in particular is late 20th century.
The hands of all theropods were strong, but like birds (the theropods' modern cousins) they were usually positioned facing sideways in a "wing stance", while older media depictions positioned them more like hands. They could pin a prey animal and their arms were far stronger than those of a human's, but they could not clench to grip like Drake is shown doing.
Many depictions of Drake fully transformed have his stance too far up, with the front end raising up. In reality the stance of the allosaurus was much lower at the front, as is the case of almost all theropods.
This is the first Ancient Zoan power seen in the series, and the first to be officially named, 420 chapters after its initial appearance.