Heimdall

"Death before dishonor."

-Heimdall, Keeper of the Bifrost, to the Fallen Seraph Azazel

Heimdall is one of the Aesir pantheon, and serves as Asgard's Guardian, and the Keeper of the Bifrost, its rainbow bridge. A formidable warrior among a pantheon of warriors, Heimdall is utterly devoted to the realm of Asgard and its people. A loner fiercely devoted to his duty, Heimdall rarely leaves his hall of Himinbjorg, where he stands watchfully guarding the Bifrost, and leaving Asgard is rarer still. Whenever the Aesir march off to war, Heimdall is the first and only choice by Odin to lead its defenses in his absence.

Recent Events
As the Aesir marched off to war, Heimdall remained behind in Asgard, maintaining his post guarding the Bifrost, and watching over for threats to Asgard. It was a tremendous shock to him, however, when the debauched Seraph Azazel and his degenerate Sixth Angelic Legion appeared within the realm, having somehow discerned a path through the Yggdrasil tree not even the Allfather himself knew.

Though taken off guard by the arrival through a root he thought sealed, Heimdall spotted the attackers immediately, and was quick to raise the alarm, sounding the mighty Gjallarhorn and waking all of Asgard from his nighttime sleep. Thanks to the horn's magic, he knew that Odin and the other Aesir would be made aware of the attack.

Heimdall unleashed what Einherjar and Valkyries remained to him, while he remained at Himinbjorg. As his troops bought him time, Heimdall activated the Bifrost, and used its destructive power to decimate a large portion of the Heartseekers legion. Shortly thereafter, however, he was engaged by its Seraph, Azazel. Heimdall fought valiantly, managing to avoid all hail of destructive Light conjured by Azazel, and blinding his eye with by capitalizing on the Seraph being distracted by a moment of gloating. He was unable to overcome the Serpent of Nymera, however, and was disarmed and defeated. Refusing to surrender, Heimdall dealt his enemy one last blow. Drawing upon his connection to the Bifrost, Heimdall burned through the last of his energy, unleashed a vortex of Light and Realms distorting power. Though he was destroyed in the explosion, Heimdall avoided the fate of being humiliated and torture, and dealt a greivous wound to his foe.