Who opens Bifrost?

Who exactly is responsible for unlocking the gates of Bifrost, the magnificent bridge that connects the realms of Asgard and Midgard in Norse mythology? Is it Odin, the Allfather, who wields the power of wisdom and sorcery, or perhaps one of his trusted sons like Thor, the thunder god, or Balder, the god of light? Could it be a lesser deity or a powerful mortal hero, entrusted with the key to this cosmic crossing? The question lingers, intriguing those who ponder the mysteries of the Norse pantheon and the workings of their divine realms. Who, indeed, holds the power to open Bifrost and allow passage between the worlds?