User blog comment:B214/Season 3 discussion/@comment-26662734-20150820072336/@comment-26668768-20150821115902

—Then Koneko-chan mutters. "—[D×D]." Everyone gazes at Koneko-chan's muttering. Koneko-chan is surprised at having so much attention directed towards her. She then continues while feeling shy. "Well, since it's a mixed team consisted of different beings, that's how I felt......" Rias then asks. "What does the [D×D] stand for? Does it stand for being a Dragon of Dragon like Great Red?" "No, it can stand for Devils, also a Dragon, and the word "Fallen" of a Fallen Angel—like downfall." Koneko-chan answers. I see, so it means [D×D] while pointing towards Devils, Dragons, and such. Sensei nods his head. "Well, we can also forcefully add any names starting with the letter "D". Though it's certain that we need a name. I see, [D×D] huh...... It may also be easy to remember it while having the meaning of protecting Great Red that is the [D×D]. I think that will be good, but how about you guys?"

DxD volume 16