Fine you can be my butler

Then

 he said I shall form a contract with you

I asked what contract

He said it is the proof of our master servant relationship

Fine how do we do it?

He said it is done by mixing our blood together

I cut my hand then gave him some drops of my blood he also did the same

Then he mixed the blood and suddenly my right eye glowed and I saw there was a crest in my right eye also there was a crest in the butler’s hand

Then he said, from now on your wish shall be my command young master from this day on I Alfred smith shall vow to protect you with my life.