I'm interested in Shinichi's take of this story, especially with Luka's gender nonconformity, as well as the fact that Lucy is already in a relationship despite having told Mina which of the three men they chose the other night. Also, leave it Shinichi to make even cute top-hat wearing rat/frog/bird....things be a dark reference to the original novel. Mainly, whether it's an intended misspelling or not, Renfielb is a ref to Renfield, a mental patient in the original novel who tends to eat insects and animals (such as rats or birds) because he believes that he can obtain their life-force that way. Dracula offers the man immortality in exchange for his loyalty, which is why the little creature refers to Dracula as "the master".