Kumo Kumo no Mi/Saranyu Caste Techniques

Saranryu Caste is a technique first seen in Hiro's battle against Asteria. According to Hiro, he developed this form on during his training with Fabricio el Tigre, however he saved it solely for Asteria due to its destructive capabilities.

Overview
Hiro condenses clouds into pairs of thin layers on his skin. The bottom layer is given a positive charge. While the top layer is given a negative charge. The electric charge in the layers causes Hiro's skin to appear as if it's glowing like a lightning bolt, making it similar to Varuna Caste in this aspect, however what makes the more powerful, and more dangerous, is the use what Hiro calls "The Railgun". Negative repels negative, so in this case, Hiro would alter the charge of the various layers of clouds on his skin, causing the top layer to be repelled away from the bottom layer.

To contain the charge, Hiro creates a boundary of iron clouds around both layers, which is heated to a high temperature. Due to metal at high temperature being less outward conductive, it contains the electric charge. With this, he can remove the iron cloud at his discretion. This allows him to fire the top layer as a supersonic bullet of electrically charged clouds, hence railgun. He can do this with other body parts, such as to increase his speed by repel the top layer that is on your back of his soles, creating a "rocket" effect, allowing him to move at supersonic speeds, allowing him to move at supersonic speeds without expelling large amounts of energy in exchange. This caste's power is notably more powerful than even Vayu Caste in terms of power, defense, speed, and all around versatility, due to this its use is limited extensively.

The most dangerous aspect of this caste is that he can combine this caste with other castes without negative effects, allowing him to enhance his stats even further depending on which caste he may choose. To go even further, Hiro has combined all of his castes into one to create [[Kumo Kumo no Mi/Deva Caste Techs.|his most powerful caste yet], though it was only seen once very briefly at the cost of Hiro's right arm and left leg.

Techniques Utilized

 * Kyōfū Ōtsuchi (強風大槌): After coating his arm in, Hiro then surrounds his fist with wind, and strikes his opponent at a high speed, releasing the wind on contact with the foe, sending the person in question flying along with a tornado of wind destroying everything around them. This attack had enough power behind it to send the normally weather immune Aeolus flying for miles.
 * Kyōfū Tsume no Doraiba (強風爪のドライバ): Hiro's so called strongest attack. Hiro coats his arm in Busoshoku Haki, and rapidly coils his arm while compressing it at the same time. He then punches at his foe, un-coiling his arm at a high speed, while releasing a powerful gale along with it, striking his foe with a powerful, drill like attack with the power behind it to destroy numerous buildings in it's wake, as well as defeat the mighty Aeolus during their fight.