Responses
Well, I thought of that too for a second. I don't know but surely it was given to us to say something. For sure, there was something going on between Undertaker and Vincent - they had to be close, maybe they are related?
I also think it was kind of... sweet what Vincent said at the end of the extra chapter to all of us - to watch over his son's fate. It was a touching indirect interaction between the author and us - readers. God, I love Yana-sensei! :3
Idk. Is that extra chapter a foreshadowing of something? (when the reaper gave ciel's dad his rosette)