- "Be warned, I shall uphold my sacred oath to protect this realm as its gatekeeper. If your return threatens the safety of Asgard, my gate will remain shut."
- ―Heimdall.[src]
Heimdall was an Asgardian and the protector and guardian of the Bifrost Bridge until its destruction at the hands of Thor Odinson to stop the bridge's energy from destroying Jotunheim.