[LKK]

Originally Posted by White Manju Bun

Spoiler for speculation continues:

I dunno, I know Sebastian wants his soul but seeing as he's said on many occasions that one he wont lie to Ciel and to he serves his master and does whatever Ciel asks I think the only way Sebastian would kill Ciel is if Ciel ordered him too. Other then that I dont see Sebastian harming Ciel cuz if he really wanted his soul right away he would have let Grell kill him in epi 5

Spoiler for speculation ad infinitum:

Demons are tricksy beings. He could be lying or adhering to the letter of the law interpretation of Ciel's commands. (Like he did when he compiled the list of possible Ripper suspects.)

As for why Sebastian hasn't taken Ciel's soul yet, maybe Sebastian is waiting for something. Maturity? Time to produce an heir to continue the Phantomhive - demon relationship? Something completely different?