After the great 蘑菇 war, it 说 Marcy and Simon were the only ones left, except how can Marceline have a dad (Hunsen Abedeer) then?

1: her dad is immortal
2: he lives in the nightosphere, which is located in a different universe.

He left his daughter and escaped to the nightosphere. That coward.

That's a great question,although as mentioned Marcy's father is Immortal and lives in the nightosphere and obviously there's a certain way one needs to get there..and how it became like that,I don't know..but it is quite confusing..

Where did it say her father died in the war? And Marceline even in the episodes "Finn the Human" and "Jake the Dog" reached a thousand years old. That is beyond an epic feat for a human. And her skin, ears, and teeth. Human? REALLY? One can't even claim mutation since she lived during the war.
Her father is a demon. SHE is a demon. Maybe half human if her mother was one, but her 照片 appearances don't point towards a human mother. 你 already see how little he thinks of humans, even demonkind. He just barely cared for Finn and Jake, and their his daughter's friends. Not too much evidence is leaning towards Hunson having a child with a human 或者 claiming a human child as his own. Hunson most likely stayed MIA for most of the war and beyond. Maybe he didn't really know how to be a good dad and unfortunately didn't have good enough communication skills in her early life to keep a healthy relationship going. It seems like he cares, though.

Marceline's father is a demon and her [dead] mother is a human. The 蘑菇 War was caused 由 humans so Hunson is not involved in this. Marceline, in the present, has bite marks on her neck, which implies that she was bitten 由 a vampire in the past 1000 years.

He can't die marcy 说 it herself in the episode when he dad escapes the nitosphere so he is in the nitosphere when that happened, I wonder who marcy's mom is?