User blog comment:IamJakuhoRaikoben/Chapter 413: The Book of E.N.D, Review./@comment-1839664-20141223004016

Something interesting from side story of MFT:
 * Kakihara Tetsuya, VA of Natsu, originally wanted to audition for Gray's role, but was offered to audition for Natsu's part instead.
 * Neither he nor Ishihira Shinji, Director of FT, has any grasp of how Natsu should sound like.
 * Which lead to Ishihira to joke about the anime will begin without Natsu at that rate.
 * After Tetsuya did his line, he was going to ask them if he can let him audition for Gray's part, but was told that he's done for the day, and Gray's part was not necessary. (He was dejected, of course.)
 * Rest isn't as interesting, just basically him being welcomed into the FT production family. (Mashima was there on the recording of the first episode).