[Konic]

If I take Kaldor Draigo as my lord of war choice along with a Librarian as my HQ choice, am I allowed to say that my Librarian is my warlord and roll for a trait with him instead of going with Kaldor Draigo's codex given warlord trait? Or is this not possible at all?

I ask only because I feel as though Draigos warlord trait is weak when not fighting daemons and would prefer a chance to roll for something better.

 

[ntaw]

Any Character model in your Primary Detachment can be your Warlord and get a Trait, whether rolled for or pre determined like with Draigo.

 

[Nordicus]

@ntaw has it right - Although be sure to check out the wrapsheet for your character. Certain characters (Abaddon for Chaos Space Marines for example) states that if you include that character in your primary detachment, he must be the warlord.

Unless the above is stated specifically, you can choose any character to be your warlord.

 

[Mossy Toes]

Any Character model in your Primary Detachment can be your Warlord and get a Trait, whether rolled for or pre determined like with Draigo.
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Isn't there something about having to choose any Independent Character; and if you don't have any of those, instead any Character? Don't have access to by books just now, but so that you can't have a Tactical Squad's Veteran Sergeant as a Warlord before your Librarian, or something. I'm forgetting the specifics of it, but it still doesn't affect the difference between a LoW or an HQ, so it's not too relevant to the OP's question (which has already been answered handily)

 

[mayegelt]

When choosing your army, you must nominate one model to be your Warlord. Unless specified otherwise, this must be a character model. If you do not have any character models in your army, then select any other model in your army to be the Warlord. The model you choose as your Warlord also determines your Primary Detachment.

So basically any character. This means that even a non independent character like a squad leader can be your warlord. Though as said above some chars say they have to be warlord. Somevsay they can never be warlord (i think a spacewolf guy has that). And in wierd situations you can have insane things be your warlord like the lead Helbrute in a Murderpack (as 1 of the 5 becomes a character and gains look out sir). Back in thr previous version of Eldar codex a Wrathlord had Monstrous Creature (character) as his type. And in Iyanden you can take a Wraithknight as leader if you wish even though it is not a character.

 

[Konic]

So if I choose to take my Librarian as my warlord and roll for his warlord trait, I'm assuming Draigos codex given warlord trait cannot be used on top of what my Librarian would have rolled for.

As far as I'm aware it doesn't state that Draigo must be taken as the warlord but I will have to make sure.

 

[mayegelt]

Yeah only the warlord gains the warlord trait. So you can't just take a load of people with warlord traits and use them all.