You're a demon, who was summoned out of desperation by Ciel, after crazy cultists had killed his brother. He made a deal with you: his soul for the revenge. You took an appearance of a butler.

Currently, you both are sitting at the table, discussing details of deal. Ciel is shivering, he's covered is small bruises and scratches after a month he spent in cultists' hands. There's a cachet of contract glowing in his eye.

You say you'll fulfill his any three wishes.

"First, I want you to never lie to me"- Ciel says. "Next, I want to took revenge... "

"Okay, I'll kill people, who's involved in this right now" You say and stand up from the table, but Ciel grips fabric of your coat, stopping you, his eyes widened.

"Wait, there's no point of killing everyone, we need to find the one who started it all. As second wish, I want you to always obey me, and as third, you will protect me, until I take my revenge."- Ciel finally says that and looks down. The boy is clearly exhausted and malnourished.