I added the translation for the interview in the D.Gray-man Fanbook Gray Log.
It’s a talk between Hoshino Katsura, Murase Ayumu-san (voice actor for Allen and Nea) and Aoyama Yutaka (voice actor for the Millennium Earl and Mana). They talk about voice acting, their favourite characters in D.Gray-man and Hoshino also mentions things in her childhood which may have inspired some ideas in D.Gray-man.
The translation is in the D.Gray-man page as usual.
Mittens Translations 