What if Fiona wasn't part of Ice King's imagination, but a real person who lived a super long time ago. And she started Susan Strong's race a super long time ago before all of the Simon and Marcy stuff. And maybe Ice King wanted her to be real because Simon knew her and was her friend, and Ice King can remember it a little bit.
Someone came up with the believable theory that P.B (princess bubblegum) was alive for the mushroom war and was mutated from a human to gum due to the toxic waste from the nuclear bombs. Sorry if you came up with the theory! I taks ABSOLUTELY no credit towards this theory. Thank you for this GREAT theory
Adventure Time Ice prince Finn and Finn
Picture.. possibly of Marcelines mother
A 'Hi' from Marceline The Vampire Queen
“とても素敵なタグ見つけたので落書きで参加！宗近じいじと小狐丸 #刀剣男士スーツ企画” touken ranbu 刀剣乱舞 game boy
Google Image Result for http://images1.wikia.nocookie.net/__cb20100512224054/adventuretimewithfinnandjake/images/9/9e/Peppermint_Butler.png
I Remember you... Hambo by =Rumay-Chian on deviantART