Question: who is acnologia fairy tail?
Answer: English Voice Acnologia (アクノロギア Akunorogia), known to be fearsomely reputed as The Dragon King (竜の王 Ryū no Ō), was a cataclysmically powerful Dragon Slayer that can take the form of a Dragon at any time due from his overuse of Dragon Slayer Magic and bathing in the blood of the Dragons he killed.