Glad you like it :P And no problem. Lord knows I have my weeks where I don't have time to reply :P

I was thinking, I think it would be interesting if, because of his unique blood type, the effect the demon has on him is a lot less than with other humans. It would be an interesting indicator for the demon to notice(Eventually :P) which leads him to the conclusion about his blood :P It'll also make Amano different from his previous masters, hence, more interesting :P Well, more interesting than he already is that is :P