Second Cochlea Raid

Under the cover of the 11th Ward Battle, Aogiri Tree attacked Cochlea under Tatara's command. They broke into Cochlea until the SS Floor, and retreated before Special Class Kishou Arima could arrive to support Cochlea's staff.

CCG

 * Cochlea staff
 * Kyouji Misaka - Warden
 * Shinme Haisaki - Deputy Warden

Aogiri Tree

 * Tatara - Command

Casualties

 * Warden Kyouji Misaka fell in battle.
 * Cochlea staff suffered major losses.

Aftermath

 * 3 SS-rated (among them Shachi and a Clown), 6 S-rated (among them Naki) and 37 A-rated ghoul prisoners escaped from Cochlea. Shachi and Naki joined Aogiri.
 * Warden Kyouji Misaka fell in battle, Cochlea staff suffered major losses, and some facilities inside Cochlea were damaged. Misaka was succeeded by his deputy, Shinme Haisaki.