Ax Bass

The Axe-Bass is an heirloom of Marceline's family. It was originally a battle axe before Marceline converted it into a bass guitar, which Marceline's father calls "some kind of lute." It makes its debut in "Henchman," where Marceline plays and sings the Fisherman Song for the Second Nut Son. Later, she orders Finn to kill the Dimple Plant Monster with it, but he refuses. In the episode "It Came from the Nightosphere," she plays the Fry Song with the bass. When Finn summons her father, Marceline's dad seems surprised that Marceline has it and takes it from her. In her efforts to reclaim it, she is shown to care somewhat more for the bass than she does for Finn, as she chooses to save it rather than Finn from hitting the ground. It shows up in another episode which is Go With Me, where she was about to play it, until Finn interupted her by his singing outside her house. It appears again in What Was Missing, when she plays it in the songs I'm Just Your Problem and What Am I To You. It's latest sighting was in the episode Marceline's Closet, where Marceline plays it in her song based off of her journal.

Design
It is an entirely red, double-sided battle axe with two chips on the right side. The head stock was most likely added by Marceline, along with the machine heads, two on each side. The pickups, also added by Marceline, appear to be single coils of unknown manufacture. The body has just two knobs (for volume and tone).

Trivia
All make the Axe Bass model, but it is a variation of the Axe Guitar Series.
 * In "Henchman", the bladed ends were silver. However, in "It Came from the Nightosphere," they were red.
 * In "It Came From The Nightosphere" the Axe-Bass is referred to as both a bass and a guitar.
 * Marceline's Axe Bass is highly similar to The Bloo Superdude's guitar in Fostor's Home for Inaginary Friends' The Bloo Superdude and the Magic Potato
 * Somehow the Axe-Bass can be clearly heard in "It Came From The Nightosphere" when Marceline sings the "Fry Song," even though it isn't plugged into an amplifier. This can also be observed in "Henchman" and "Go With Me" and "What Was Missing".
 * It is unknown whether the Axe-Bass has a truss rod, which curves the neck so that the strings do not lay flat against the fingerboard, although the neck must be curved somehow for Marceline to be able to play it.
 * It is one of three basses that Marceline owns, the other two being the bass in "Evicted!" and the Butterfly Bass in "Heat Signature."
 * It was probably made in a design that before, people referred to guitars in slang by the word 'axe' and they probably just combined it together.
 * MGM Guitars & Basses and five of its subsidiaries:
 * Elmore Guitars and Basses
 * Riot Basses
 * Ryatt Guitars, Basses & Banjoes
 * Orion Instruments
 * DroneClone Instruments