In Norse myths, Vidar is foretold to survive Ragnarok, the apocalyptic battle that leads to the death of many gods, including Odin. Vidar is known for his strength and vengeance and is destined to avenge his father, Odin, by defeating the wolf Fenrir. His survival and actions embody hope for the rebirth of the world after destruction, emphasizing themes of resilience and renewal in Norse mythology.