So I signed my in-game wife Lydia up to join the Blades at the end of Alduin's wall, and this was before I knew the Blades would ask me to kill P-Nax.

When they pulled off such a [censored] move, I immediately withdrew Lydia from them by asking her to move back to Breezehome.

The problem is; how do I get rid of her Blades armor? Is there a console command that changes the default gear of your followers/wife? I've tried using the console commands to remove all her items, but the next time I walk through the door she's back in her Blades outfit.

She swore an oath, buddy. She might have moved back in with you, but she will always be a Blade.

Well, the Blades swore an oath to protect and serve the Dragonborn, but the moment I refuse to kill Paarthurnax, I'm no longer welcome in the temple, so that says quite a lot about the binding quality of the oaths of the Blades

Besides, if we're talking about RPing within the game, Lydia and my character broke off from the Blades, becoming wandering Ronin sellswords.

Still, that doesn't answer my question

If you're on PC, open console, click on Lydia and type removeallitems.

That will make everything she has disappear, and she will be left in her underwear.

Lydia's a little chunky, and could stand to drop a couple-- just sayin'.

Thanks, but I tried that already It does remove all her items, but when I leave Breezehome and come back, she's there in her Blades armor again :/

Because when you sacrifice her to the Blades, that becomes her default armor (like the steel armor when you first meet her). Followers are scripted to have their default armor at all times to keep them from being naked, which is why we have the 'decreased carrying capacity' bug (every time you dismiss your follower, the game adds a new set of default invisible armor and weapons just to make sure they never go naked - and this adds up over time).

Yeah, I just wish/hope there was/is a console command that allowed me to change that default armor :/

Then the CK is out you can download an mod after 10 minutes.

There are settings for the NPC's clothing called "Outfit" and "SleepingOutfit"; the outfit is usually called something like "CWGeneralTulliusCoatNoHelmet" and most NPCs have the "default" sleeping outfit, which I assume means that they sleep in their normal outfit.

Outfits respawn in the inventory if every piece is removed, and can, apparently, be changed in-game, as Brynjolf, Karliah, Delphine, Esbern, Astrid, and any followers recruited into the Blades all change equipment. You'll know what pieces are part of the outfit if you click on them in the console and type "inv"; this will list everything in their inventory.

I do not know how to change a default outfit, but I do know that you can keep Lydia out of it by removeing everything except one piece. The Blades armor outfit has boots, gauntlets, armor, a shield, and a helmet. For the remaining piece, you can have her equip something else over it by using "equipitem [whatever the item code is] 1". She will never unequip this item, though you can remove it through the inventory share, though if you do, her Blades Armor will reappear.

Thank you! That seems to have done the trick