I knew something was wrong, Blood Sin was talking much more easily now and seemed very excited to the point of being scary.
I did my best to continue healing while thinking about everything I've been through, I'm still not sure what the Blood Silhouettes mean, but it's undeniable that I only started hearing her faint, short voice after arriving in the city.
If I think that blood creatures had the ability to make my blood run wild out of control, then they must be a representation of Blood Sin's wild out of control.
I don't know if I'm right, but it's the only thing that makes sense, the same goes for dark creatures, I know that their attacks affect emotions just like blood creatures' attacks affect blood.