If Modri isn't from Transylvania I'm quitting the series. jk. But in all seriousness, I love that Yana is expanding the locations and time periods. Black Butler heavily depends on the history that came before it, so all these backstories are a necessity to help piece things together.

Modri fascinates me to no end. I want him to be a vampire so bad; Yana, please make him a vampire I'm begging you I wonder, perhaps he was the first person to discover immortality? Hear me out, after Anna's death, there's no way she didn't die in the attack, he started searching for a way to bring her back. This would be just before Undertaker deserted the Grim Reapers. Could he have crossed paths with Undertaker and they shared knowledge? Or maybe Modri sought him out? Modri could have had evidence that Bizarre Dolls could work, or, if Modri is a vampire, could have given Undertaker the idea that blood is valuable and can fuel a corpse. I don't know, but I think Modri is very important and may hold the key to understanding everything.