Blitz Hannibal is a DLC Aragami first appearing in GE2's bonus story chapter focusing on Lindow Amamiya.
The following information is taken from the official in-game descriptions of the Aragami found in the NORN Terminal's database.
God Eater Resurrection
A white-bodied mutant Hannibal that abruptly appeared. It takes its name from its lighting-fast agility that makes it extremely hard to track. When encountering this Aragami, it is vital to remain calm and steady. Do not let its speed force you onto the back foot. Its origin is currently being investigated, and may have something to do with the Corrosive Hannibal.