Yes. The English dub for BlazBlue Central Fiction exists. It adds to the accessibility and appeal of the game for English-speaking players, allowing them to immerse themselves in the story and gameplay with familiar language.
Ryuk would probably just be amused. He is a Shinigami who has seen a lot in his existence. Fanfiction is just another strange human creation to him. He might chuckle at some of the more outlandish ideas in the fanfictions, like a character having superpowers beyond the Death Note.
Misa would likely be excited. She is a big fan of Light and the whole 'Kira' concept. In fanfiction, if there are scenarios where she has more power or a closer relationship with Light, she would be all for it. However, she might also get jealous if there are other female characters getting too close to Light in the fanfictions.
The absence of an English dub for Central Fiction could be because the developers focused on other aspects like gameplay improvements or it might not have been seen as commercially viable to invest in a dub.
In a classic horror story English dub, you can expect creepy background music, vivid character voices that convey fear, and a slow-paced narration to build suspense. Also, the voice actors usually have a good control over tone and pitch to create a terrifying atmosphere.
Overall, the English dub is okay. The translation is understandable, and the voice actors do a passable job, but it might not capture all the nuances of the original.