|Location||Player location (always follows)|
|Primary Skills||Heavy Armor, One-handed, Archery, Block|
The Spectral Assassin is the spirit of an infamous and well-known Imperial assassin of the Dark Brotherhood, Lucien Lachance. He now serves Sithis as a spirit and, thanks to you, is able to continue his work. He can be summoned once a day with the power Summon Spectral Assassin, given as reward for completing Bound Until Death.
The Spectral Assassin is essentially a free follower. He will follow the player anywhere at all times until he is killed (although he can get lost). He is equipped with the Dark Brotherhood shrouded robes (like Festus Krex), and attacks using a steel dagger. He counts as a summon similar to those created with conjuration spells, and will occupy the slot as the one summon you are allowed without the Twin Souls perk (see Bugs section).
While he cannot be engaged in conversation, he will comment on many things while he is summoned, such as the player's current contract for the Dark Brotherhood, events from Oblivion, Sithis, and his own thoughts. It's also revealed that he traveled in Skyrim in his lifetime, prior to events in Oblivion, as he also remarks on each town you visit and his memories of the place. Lucien is able to communicate with Sithis, and ascertain the dread father's desires.
 Former Life
In life, Lucien Lachance was an Imperial assassin and a Speaker of the Black Hand, the core governing body of the Dark Brotherhood. His only formal residence was Fort Farragut, east of Cheydinhal. He was a highly respected member of the Dark Brotherhood and even the Night Mother acknowledged his loyalty, berating a Speaker for claiming otherwise. Lucien Lachance was believed to be a traitor, but he was actually framed. He met a very gruesome death because of his suspected attempt to destroy the Dark Brotherhood.
While summoned and following the player, the Spectral Assassin can speak many lines based on the context of location, current quest, or other situations.
- Outside: "I remember Skyrim from my youth, and the glistening crimson on fields of white."
- Whiterun: "Whiterun, home of the Skyforge. It is said a blade forged in its fires can cut through sinew as if it were parchment."
- Riften: "I do so love Riften. I journeyed here in my youth. A thief took my purse... so I took his eyes. It was a fair exchange."
- Windhelm "Windhelm. White as bone, and cold as the Void."
- College of Winterhold: "Do you feel it? Magic. Deep and ancient. It resonates from the College, like the beating of a heart."
- Dark Brotherhood Sanctuary: "You know, a good Purification might be just what this Sanctuary needs..."
- Markarth: "An ancient city, Markarth. by the Dwemer, the dwarves of old. To think, an entire race... eradicated. Not even I can take credit for that feat."
- Solitude: "Ah, yes. Solitude. Seat of the High King of Skyrim. Messy business, kingslaying. Ah, but so very satisfying..."
 In combat
"Your enemies will soon know the wrath of Sithis."
"The Dread Father works through me. And his work has just begun."
|When near Shadowmere: "Shadowmere, my old and dear friend..."
When in one of the Sanctuaries: "Dreary, dank, and dimly lit. Truly a Sanctuary to call home."
|When nearing the end of the questline: "You stand now at the precipice of the Void. I am reminded of another Listener, a protege I knew long ago. So long ago..."|
- The Spectral Assassin is voiced by Wes Johnson, who voiced Lucien Lachance in Oblivion.
- He is considered a member of the Dark Brotherhood, so if you attack him, you will have to pay a fine to Nazir.
- He will not turn hostile with ranged attacks, so you can use this to level up skills.[verification needed — Does this work? If so, is it archery or all ranged attacks?]
- If you transform into a vampire lord, he will immediately die.
- For historical information on Lucien Lachance, see the lore article.
- As noted above, summoning the Spectral Assassin counts against your summon limit for Conjuration spells, and will make existing summons disappear as usual for such effects. However, the effect that summons him doesn't properly respect the Twin Souls perk -- if you have the perk, summoning him will always make all your other summons vanish. If you have one, it will vanish as if you didn't have the perk; if you have two, both will vanish. Once he has been summoned, the Twin Souls perk allows you to summon a second creature alongside him as usual; only his moment of summoning ignores the perk.
- It is possible that a bug can occur where he will no longer have the spectral texture but will in fact look like an ordinary NPC, wearing Shrouded Robes, similar to members of the Dark Brotherhood Sanctuary. It is unknown what causes this but he does eventually return to the 'spectral' state.
- It is not possible to have the Spectral Assassin and the Hero of Sovngarde Summon out together, even with the twin souls perk. Summoning one after the other will unsummon the former. The same applies with the Summon Arniel's Shade spell.
- When he dies, he will leave behind ghostly blue remains that never despawn.