Future Devil

It has an extremely playful personality, regularly boasting that the future is best. The Future Devil's contracts are typically very costly, but after witnessing Aki's future, it gives him a contract on the condition that it be allowed to reside inside his eye to witness his horrible future up close, mocking him. After showing Aki a vision of the future, he questions the devil on its motive, only for it to respond that he must shout "The future rules!" before summoning it, which Aki quickly rebuffs. Different than other devils, Future Devil will not just wait until he is called and sometimes intercepts the hunter's life. He gives Aki the future about his death, making Aki desperately tries to find a way to save both Power and Denji which results in himself killed by Denji solely.

The Future Devil's lower half resembles a tree growing from the floor with branches and a trunk extending up to a humanoid body with outstretched arms and a horned head. Multiple vine-like streamers grow from its arms and chest. Its face has three pairs of eyes stacked on top of each other vertically and its wide mouth is almost perpetually open. The Future Devil has a large hole in the center of its chest, inside of which is another oversized eye.

As a Devil, the Future Devil possesses all of the standard devil abilities, such the ability to make contracts with humans for a price. It's implied that the Future Devil is fairly strong, as Kurose and Tendo take Aki to see it in order to find a weapon he can use against Devils after the Fox Devil ended their contract. The contracts with it seen so far are: * A contract with Aki Hayakawa, in exchange for letting the Future Devil reside in his right eye, Aki can see 4-5 seconds into the future. * A contract with an unnamed Public Safety Devil hunter, in exchange for half their lifespan, the Devil Hunter can use the Future Devil's power. * A contract with an unnamed Public Safety Devil hunter, in exchange for their eyes, sense of taste and smell, the Devil Hunter can use the Future Devil's power. *Contracts with 30 separate convicts, in exchange for unknown prices, each of the convicts were told the date of their deaths. Presumably, most contracts with it give the Devil Hunter the ability to see the future momentarily. However, as Aki discovered in his fight with the Ghost Devil, there is a notable weakness in that being able to see the future does not guarantee that you can act on it, as he was overwhelmed by the Ghost Devil's barrage of attacks despite being able to see them coming.