April

Apuriru (アプリル) was a member of the Dissidence Movement who appears in the Attack on Titan: Before the Fall manga.

Story
At the start of the Dissidence Movement's rebellion within the Industrial City, August gives April the task of gathering twenty men to keep the gate of the city shut. Later, when Gloria Bernhart and the Military Police Brigade arrive to breach the gate, April sends his men to investigate. He begins to panic upon seeing Military Policemen charging through the breached gate, but his thoughts are cut short when the top of his head is sliced off by an MP's blade, his comrades falling beside him in the slaughter.

Trivia

 * Given how August, Juli, and Mai's code names are based on the months of August, July, May, it can be said that April's code name corresponds with the month of April.