Netsu Netsu no Mi

The Netsu Netsu no Mi falls under the Paramecia class, granting its holder the power to pour heat out of their own body. Whoever eats it becomes a High Heat Human, rendered in VIZ releases as Bakeman. Charlotte Oven, a son of the Big Mom Pirates' captain, consumed this fruit. English adaptations title it the Heat-Heat Fruit, and its name simply derives from netsu, Japanese for heat.

Oven can superheat parts of himself well past what a person can endure, turning a punch or even a touch into a burn and boosting his melee damage. The heat passes readily into other things: he can roast a weapon to raise its bite, set his own clothing and blade alight, or push warmth into an enemy's weapon until it grows too hot to grip. That transfer does not always need contact, as he showed by igniting a gun from a distance. Most strikingly, he can heat seawater itself, boiling it into a hazard zone that threatens ships and is far worse for anyone swimming, making him a wall against escape by sea. His main limit is that the power does little against foes who resist heat, as when Niji's Raid Suit shrugged off the temperature, and he still suffers the standard Devil Fruit weaknesses.

His named techniques build on these uses. Nekkai Jigoku sinks his heated hands into the ocean to boil a vast radius, brutal against aquatic creatures and ships, with the variant Nekkai Gyorai firing focused underwater heat beams like torpedoes instead. Heat Denasshi heats his forearm before a tremendous punch, first thrown at Pekoms. English releases rename these Tropical Torment, Tropical Torpedoes, and Heat Beating.

Charlotte Oven is the fruit's only user. He fights by transferring heat onto enemy weapons, his own gear, and opponents directly, often trying to set foes ablaze through nothing more than eye contact, and grabbing hold to burn them outright, as he did to Chopper's scalp. His sea-boiling ability makes him a constant threat to crews trying to flee Totto Land, as seen when he moved to stop the Nostra Castello and later struck Wadatsumi escaping with the Thousand Sunny. The fruit resembles several non-canon heat powers, including the Kachi Kachi no Mi and Atsu Atsu no Mi, though it differs in being able to channel heat into outside objects and water.