That was a very interesting Vid! Holy ****! I never thought the mystical whip was called Excalibur, lol. That's kinda impressive. It feels like there could be a connection to King Arthur in there somewhere (that's just speculation on my part). About the character Lucy Seward. Your friend did seem confused with this entry so perhaps I should offer my own tid-bit of clarity for him (please tell him this I would like to hear his feedback).
Lucy Seward sounds like she's the daughter of Dr. John Seward. No doubt Dr. Seward married after the events of the novel. Dr Seward loved Lucy Westenra (Holmwood) however she was transformed by Dracula and subsequently killed by Helsing and company, he probably named his future daughter after his first love in honor of her memory. This sounds to me to be the most plausible explanation as you don't hear the name Seward and not have your mind go directly to the infamous doctor of the asylum.
The info later on helps also to establish that Vlad the impaler (historical person) and Count Dracula (the CV series) are in fact one and the same. This leaves no doubt in my mind and firmly puts to rest some of the debates we've had here on the dungeon forums about whether or not they are the same person. That document confirms what I've strongly felt all these years. Now I know that IGA has taken the series into it's own direction and retconned a whole lot. But to me this document solidifies things for me about the series since I much prefer the pre-IGA Castlevania series on the whole. This document isn't filled with your typical Japanese cliché story-telling that IGA was obsessed with. Instead those at Konami were really trying to do actual historical referencing in order to flesh out the series. Would it have killed IGA to go along with that instead of where he actually went?
Another thing I noticed is that Rondo of blood is nowhere to be found. This document was printed in 1994 and Rondo was made in 1993. Kinda wondered what was going on there.