Simon Petrikov

Sometime before the Mushroom War, Ice King was a normal, olive-skinned, dark-haired human named Simon Petrikov who was studying to be an antiquarian (a specialist in the knowledge of ancient artifacts). He was also a Professor of Archeology, and gained a PhD in an unknown subject. At one point, he went on an expedition to try the Armor of Zeldron, the Wand of Dispersement or the creepy porcelain lamb. He did not succeed, but still believed that these artifacts existed, and shortly after had a presentation about his expedition, where he expressed desire to search for The Enchiridion. He was ridiculed by others for his belief in magical objects.

However, shortly before the presentation, he had reached for the same book as a woman named Betty Grof, who had been a fan of his research for years. Afterwards, she approached him again, and asked him to sign her book, and pointed out runes in his book that could serve as a clue to how to find the Southeast Cove. Simon was impressed by this and asked her to go on an expedition with him, which she accepts, despite her plans for a 6-month trip to the Australian Outback. During this trip, both Simon and Betty fall in love with each other, and they manage to find the Enchiridion. When they get back, Betty urges Simon to take sole credit for finding it, which he does reluctantly, and Betty begins planning once again for a trip to the Australian Outback. Simon gets his picture taken by a horde of photographers, and his accomplishment appears in the newspaper. A few weeks after the expedition, Simon found the book Betty had reached for and had caused them to meet. He opened it to unexpectedly find a note from Betty, confessing that during the expedition she had also fallen in love in Simon, and that she wanted to travel together with him. After finding this, Simon went to the bus stop where Betty was waiting to start her trip, and confessed his love for her, starting their relationship. They fell madly in love with each other, and eventually got engaged.

Simon is known for his intelligence, kindness, and self-sacrifice. From the information given in "Holly Jolly Secrets Part II," Simon was a deeply committed and loving fiancé (to Betty). He proved to be the same way as a watchful guardian over young Marceline during the aftermath of the Mushroom War. Even when they were in great danger, Simon struggled to keep Marceline happy and helped her to always see the best of their situation. He took on a very responsible role in Marceline's life, by not only protecting her and keeping her healthy but also by teaching her right from wrong and keeping her spirits high (as seen in "Simon & Marcy"). Simon, as a rule, is known for being optimistic even at the worst of times and it is clearly one of Simon's most notable attributes.