On the wiki it says that initiating someone into the blades with Delphine will make them move to Sky Haven Temple. Is this true for your housecarls as well? I've never liked the guy who lives with me in Markarth but I'm also not so much of a scumbag as to kill him. So if I move him into Sky Haven he'll stop living with me at Vindrell Hall right?

YOU don't have to kill him, but you can get him killed by just taking him with you into dungeons and caves.

Yep, they'll move to Sky Haven. Lydia is chilling out there with Delphine, Esbern and my wife Mjoll the Lioness.

Well met friend, how can I help you? Aka thanks for confirming that for me.

But that place is so dark and dingey! They should have done it up better whilst i was away.