Tsun is much taller than any normal characters, including Altmer. The only characters that come close to his size are the Ebony Warrior and the Keeper, who stand at a scale of 1.21, while Tsun stands at a towering height of 1.34 in comparison to the Dragonborn who stands at a scale of 0.95–1.08, depending on race and gender. He wears a unique set of armor and wields a unique Ancient Nord Battle Axe. These items can only be obtained using console commands.
"What brings you, wayfarer grim, to wander here, in Sovngarde, souls-end, Shor's gift to honored dead?"
Who are you?"I am Tsun, shield-thane to Shor. The Whalebone Bridge he bade me guard and winnow all those souls whose heroic end sent them here, to Shor's lofty hall where welcome, well earned, awaits those I judge fit to join that fellowship of honor."
I pursue Alduin, the World Eater."A fateful errand. No few have chafed to face the Worm since first he set his soul-snare here at Sovngarde's threshold. But Shor restrained our wrathful onslaught - perhaps, deep counselled, your doom he foresaw."
I seek entrance to the Hall of Valor."No shade are you, as usually here passes, but living, you dare the land of the dead. By what right do you request entry?"
By right of birth. I am Dragonborn."Ah! It's been too long since last I faced a doom-driven hero of the dragon blood."
By right of glory. I lead the Companions of Jorrvaskr."I welcome the chance to challenge the blade of Ysgramor's heir, honored shield-brother/sister to Kodlak Whitemane, whom I've watched for in vain."
By right of cleverness. I am Master of the College of Winterhold."Well met, mage of Skyrim. The Nords may have forgotten their forefathers' respect for the Clever Craft, but your comrades throng this hall. Here in Shor's house we honor it still."
By right of blood. I Listen for the Night Mother."You trespass here, shadow-walker. Shor does not know you. Perhaps before the end you will earn the right to pass this way. Welcome I do not offer, but your errand I will not hinder, if my wrath you can withstand."
By right of plunder. I am a Nightingale of Nocturnal."Do not mistake the night-shrouded thief's stealthily-taken spoils, stolen and unearned, for a warrior's plunder, won in honorable battle. Your doom already binds you to your dark mistress, but your errand I will not hinder, if my wrath you can withstand."
Can I enter the Hall of Valor?"Living or dead, by decree of Shor, none may pass this perilous bridge 'till I judge them worthy by the warrior's test."
After defeating Alduin:
"This was a mighty deed! The doom of Alduin encompassed at last, and cleansed is Sovngarde of his evil snare. They will sing of this battle in Shor's hall forever. But your fate lies elsewhere. When you have completed your count of days, I may welcome you again, with glad friendship, and bid you join the blessed feasting. When you are ready to rejoin the living, just bid me so, and I will send you back."
Not yet"Tarry not too long - the land of the dead is not meant for mortals to linger."
I'm ready to return to Tamriel"Return now to Nirn, with this rich boon from Shor, my lord: a Shout to bring a hero from Sovngarde in your hour of need. Nahl...Daal...Vus!"
When the Dragonborn enters Sovngarde and presents themselves as Arch-Mage to the College of Winterhold, Tsun will welcome them with the words: "Well met, mage of Skyrim. The Nords may have forgotten their forefathers' respect for the Clever Craft, but your comrades throng this hall. Here in Shor's house we honor it still." This remark by Tsun reveals that he is well-informed about what transpires in the realm of the living, in spite of his supposed status as a "dead" god.
He is based on the real world Norse mythology individual, known as Módgud, who guards the realm of Hel and is described in the story of Baldr as challenging Hermód, who is sent to retrieve a fallen god; it is stated that Módgud demanded that Hermód state his name and business before allowing him to pass. Much like Tsun and the Whalebone bridge in Sovngarde, Módgud is similarly stationed at the Gjallarbrú (Gjöll Bridge).