Neptr

Neptr, or N.E.P.T.R. which is an acronym standing for Never Ending Pie Throwing Robot, makes his appearance in "What is Life?". He is a pie-throwing robot Finn created and brought to life so he can prank Jake. He usually calls Finn "Creator". He is made up of miniature tank treads, a microwave, a tuning fork, loose wires, a computer chip and a soup can. The episode shows that when Neptr comes to life, the right side of the microwave is actually his face, and not the can on top of him. His only main purpose in life was to prank Jake. He came to life when Finn became frustrated that Neptr wasn't working and threw Neptr out into the rain where he was hit with a lightning bolt. While this brought him to life, he wasn't fully functional, so Finn took him to Ice King's palace to use the villain's lightning bolts to fully charge him. When he was hit with Ice King's lightning bolt during the resulting battle, part of his personality was changed to a desire to collect princesses and became slightly evil, but he's also powered up to full power. He admires Finn's pranks and has decided to keep Finn as his companion, and has also decided to prank Ice King hardcore. However, he is shown to have some compassion, as he says goodbye to the (unconscious) Ice King before leaving with Finn, causing Ice King to shed a tear. After this, he and Finn throw never ending pie's at Jake. It is unkown what happened to him as he has so far not yet appeared again in the series. It is possible that Nepter is still around in the house but it is not known if he made a cameo apperance. Mabey he is living in the cave that's in the tree fort.

Trivia

 * In the end credits for "What is Life?", Neptr is listed in the credits as "n.e.p.t.e.r.", though it is unknown as to whether this was his intended name, or if the E was placed there as a mistake.