Jake

First appearance: Fighters of Lapis

Latest appearance: Fighters of Lapis 6

Jake (full title: Jake the Dog), the deuteragonist of Adventure Time, is a magical dog and Finn's constant companion, best friend, and adoptive brother. Jake has a unique set of abilities called Stretchy Powers that allow him to manipulate the shape and size of his body, coming in handy on innumerable occasions throughout his and Finn's adventures. Jake was 28 years old as of his debut (he could possibly be in his 30's by now due to the aging of other characters) in magical dog years, though he rarely acts mature. It is inferred that magical dogs have a lifespan similar to Humans, as demonstrated by an aged Jake in Dungeon Train. Then again, how exactly magical dog years correlate to human years remains to be seen, although both Finn and Jake were shown to be babies around the same time, showing that they age slightly faster. Jake is currently in a relationship with Lady Rainicorn, and, by "Jake the Dad," they are the parents of five Rainicorn-dog hybrids.

Jake was conceived when his father, Joshua, was bit by an extra-dimensional creature during an investigation with his wife Margaret. Jake was later born from the pustule on his father's head from the creature's bite and was taken by Joshua and Margaret to live alongside their natural-born son Jermaine. It is inferred that Jake's Stretchy Powers that he has had since he was a puppy are a result of his biological relationship with the shape-shifting creature. Little is known of Jake's past with his family, but for a while he was known to be a successful criminal until he retired to take part in a more respectable life as an adventurer with Finn, later settling down with Lady Rainicorn to become a father.

Abilities
Jake's Stretchy Powers enable him to modify the size, shape, and dimensions of every part of his body. Not only can he stretch and contort himself into highly specific forms, but he can also rearrange his internal organs, and teeth. In "Evicted!," he was able to shrink and move his internal organs and blood into his left thumb. Also in "Jake vs. Me-Mow," he enlarged his liver fifty-one times a dog his size, preventing him from succumbing to Me-Mow's poison. One frequent use of his powers is Key Hand, which he uses to pick locks. He has also used his arm as a bow able to accurately shoot arrows at a short distance.

Although he lacks the zeal for fighting that Finn possesses, Jake is a capable fighter. What he lacks in Finn's talent for swordsmanship, he makes up for in toughness and magical brawn. He is a capable hand to hand fighter, and can transform his limbs into weapons. He can also stretch to entangle enemies, or grow to gain a height and weight advantage. His shapeshifting can grant him supernatural strength, allowing him to simply overpower his enemies. However, Pendleton Ward has said in an interview that Jake uses his powers lazily and does not know their full extent, often hindering Jake's effectiveness in combat. Despite stating outright that he's multiple times stronger than Finn, Jake often leaves the brawling to his adoptive brother.

As shown in "Mystery Train," Jake is also able to stretch himself to "create" an entirely new person, as long as they remain connected to him. In "You Made Me," he is shown to be able to move objects through his body freely when he lets Princess Bubblegum jump into his mouth and then pushes her up through his back. Jake can be stretched by force as seen in "Ocean of Fear," when Finn stretched Jake's ears to avoid making contact with the ocean and in "Beautopia" when forced into a paddle. Jake's powers are sometimes used against his will, as in "Power Animal" where Jake's stomach took the shape of a fist and punched him so that he would wake up and eat.

Jake's stretching ability is subject to the principle of conservation of mass as seen in "The Limit." ; However, the ratio at which he retains mass is different than what applies to other masses in Ooo. It is revealed that while Jake can stretch his body to incredible lengths, his body could be pulled so long that it becomes dangerously thin. Once his mass is distributed along a certain length of his body, it becomes difficult for him to support himself; at one point, Jake was forced to walk along the ground. If he were to stretch beyond his absolute limit, it is presumed that he would completely thin out and die.

Appearances in the Fighters of Lapis series
TBA

Moveset
TBA