Main Characters: Click to Expand Finn the Human, Jake the Dog, Princess Bubblegum, Lady Rainicorn, BMO, Lumpy Space Princess, Marceline the Vampire Queen, The Ice King
Secondary Characters: Click To Expand Tree Trunks, Earl of Lemongrab, Gunter, Peppermint Butler, Cinnamon Bun, Shelby, NEPTR, Billy, The Magic Man, Martin Mertens, Flame Princess, Betty Grof, The Lich.
Minor Characters: Click to Expand The Snail, Candy People, Minor Princesses, Minor Wizards, the Lemongrab Earldom, the Fire Kingdom, Deities and Cosmic Beings, Jake and Lady Rainicorn's puppies, Joshua and Margaret, Hunson Abadeer, Shoko, Cuber, Mr. Pig, Tiffany, Susan Strong, Choose Goose, Banana Man, Ricardio, Maja, Ancient Psychic Tandem War Elephant, King of Ooo, the Grass sword, Me-Mow, Ash, Big Destiny, Duke of Nuts, James Baxter, Island Lady, Moe, King Worm, Scorcher, Kee-Oth, Ooze Monsters, Bella Noche, Johnnie, Phlannel Boxingday, Canyon, the Shape-Shifter, Peace Master, Evergreen, Gunther, Breezy, Kent, Rats, Marceline's Mother, The Vamps
Fionna and Cake Characters: Click to Expand Fionna, Cake, Prince Gumball, Lord Monochromicorn, Marshall Lee, Ice Queen. Also Ice King, Gunter, Lumpy Space Prince, Lady Lemongrabs, and BMO.
Alternative Title(s):Adventure Time With Finn And Jake, Adventure Time Finn The Human, Adventure Time Marceline, Adventure Time Ice King