Who guards the gates of Asgard?

• A. Loki
• B. Thor
• C. Odin
• D. Heimdall

Answer: (D)

Heimdall serves as the gatekeeper of Asgard. In myth and in modern tales, he stands watch at the rainbow bridge, Bifröst, and guards the entrance to Asgard, ready to sound the Gjallarhorn to warn of danger. His extraordinary senses—often described as able to hear grass growing and see for vast distances—make him uniquely suited to this role, overseeing who enters and leaves the realm.

Loki is the trickster who meddles and schemes, not the gate guardian. Thor is the mighty protector of Asgard in battle, but not the one stationed at the gates. Odin is the ruler who presides over Asgard and the known realms, rather than acting as the literal gatekeeper. So the figure most closely associated with guarding the gates is Heimdall.