Never heard the ballads they sing of Grian "Brighthelm"? Ah well. Those were my days of youthful... discretion.
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Grian Shane is the Castellan of the Warsworn fortress Helmgard Keep in Tala-Rane. He acts very nice and proper to the Fateless One when he/she first arrives, but Grian is well known for his short temper for those who get on his bad side. He's quick to react to something that angers him and oftentimes jumps before he actually thinks about it.
He is similar to Oda Celfred, as he prefers fighting over diplomacy. He demands that all of the Warsworn at Helmgard Keep keep their armor and weapons well polished and shiny.
“Welcome. So what's all this? An artifact, stolen from the Vault? And it turned up in Lorca-Rane? I see. You'll want to start with the Vault itself. I'll dispatch OathbladeGwyn Anwy to guard it; meet her there when you're ready. The Vault lies south through Tala-Rane, on the way into the Wolds.”
— upon your first encounter.
“The odd thing is, not a soul's been inside that place in centuries. Can't imagine how someone could have gotten anything out.”
“I'm glad you're here. I've taken the precaution of jailing Gwyn. A bit heavy-handed, I know, but this is a serious matter and only necessary until we've cleared this up. That Vault was hers to watch over; this can't help but put her under suspicion.”
— upon your return.
“We have a small jail at the back of the keep. Useful enough, between the Freemen and other sorts you find on the plains.”
— when asked: In a cell?
“Well... on the one hand, she was always consumed with all that dusty history, but it just doesn't seem like her. Fact is, if not Gwyn, someone helped those mages get it. But who... and how?”
— when asked: You really think she did it?
“The Vault was Gwyn's responsibility; there's no getting around that. Until it's clear precisely what happened, she'll remain where she is.”
“Yes, these mages - the... Fahrlangi, was that it? - they stole the relic, of course. But they must have had help from inside to get in. Your search must continue.”
“The things in that vault are fine for songs and tales of Eamonn. They make the Warsworn seem more legendary and grand. It's all dusty nonsense to me.”
“What's this, now? The key found among the vault intruders? I see. Well, I can say for certain that it's not the original. That was the first thing I checked after you went off to the vault.”
— when you bring him the Vault's key.
“As I told you, the first thing I did was verify the key was safe and sound in its proper place. Which means what you found is an impossible perfect copy.”
— when asked about The Key.
“Ah, yes, the gnome... um... Tarion. He'd know something of how this was done. Did Gwyn suggest this? She always did have a head for these things. Although... if she is behind this, the gnome could be a trap. Be wary. Pledgeshield. ”
“Given this turn of events, you are to find this Meroch character extract from him what you can. I have other work for Gwyn; meet her in Rathir when you're done.”
“Did you see the look on her face when we seized her? Hard to tell if it was more fear or ... relief?”
“First, I will have her tend to that Vault; high time it was cleaned and cataloged. After that... These mages call themselves Fahrlangi, right? I'd like to see what kind of footprints that name leaves behind.”
“Follow the trail, Warsworn! Someone copied that key and stole who know how many artifacts from our Vault. Go as far as you can to find them, then meet up with Gwyn in Rathir.”
Niahm Kent got on Grian's bad side and was given the duty of killing off numerous named and unnamed mob's in the Tala-Rane area.
Grian is called "brighthelm", but not because of his shining armour - in fact he's a bit dim-witted. There's a book about him, rather exaggeratingly describing his deeds, named "Tales of Brighthelm"
Like Tine Delfric and Sverri Kura, Grian Shane wears the armor set that inspired the Reckoner Knight Armor in Mass Effect 3.
WARNING TO ALL PLAYERS: There is NO advantage in larcenously taking the Warsworn Vault Key, without exception. Grian Shane is (usually, more often than not) in possession of the Warsworn Vault Key associated with the relevant Faction sub-quest (Tine Delfric is highly less likely to be in possession of the item). Any Rogue-tending player with Smoke Bomb, high Stealth skill or a roguish Warrior or Mage with Phasewalk potions, if choosing to pickpocket said key and successful, shall seriously and irreversibly scramble and abortively destroy the entire Warsworn Faction storyline of the game. In "Lock and Key" the gameplay is rendered incoherent, and upon entering the "Warsworn Vault", if the player is already in possession or had already stolen related key, the game's programming melts down; the possibility of enemy "Fahrlangi" magi from even appearing is preempted, no blacksmithing forge shows up, the necessary container(s) with plot-central items shall not appear, all dialogue and interaction with the assigned lady warrior of the Warsworn cohort accompanying the Fateless One is rendered nonsensical.