Surtur: a name originating from the Fire Giant in Norse mythology within Melina's parallel universe, rumored to storm Asgard during Ragnarök and destroy the world. Incidentally, he reportedly took down Freyr, the Norse god of daylight and fertility—though that Freyr lacked a sword and had to make do with deer antlers for a weapon.
Based on how closely this world related to her own.
The relationship between the spacetime occupied by her parallel-universe self and the spacetime of this current world.
Chapter 601