Januar

Yanuāru (ヤヌアール) is 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 Januar the task of gathering 50 troops to lock down the main street of the city.

Trivia

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