Sentai Filmworks has announced just recently that they have added the second season of Chaika the Coffin Princess Avenging Battle. The anime set to be released by them will be available through select digital outlets and a home video release will follow. The second season mind you first released October 9th 2014 and ended December 11th 2014 releasing 10 total episodes. It is a sequel of the first season that released April 10th 2014 and ended June 26th 2014 with 12 episodes being released for it. Originally the series began as a light novel December 18th 2010 and concluded on March 20th 2015 releasing 12 total volumes. A manga adaption was also released for it and started its release on October 26th 2011 and ended December 26th 2014 with 5 volumes releasing for the manga series. Lastly a plot summary of the series can be seen below quoted from MAL:
The search for the remains of Emperor Gaz continues. Chaika still in search of knowing who she really is and what her purpose is. Similarly, the Red Chaika continues the search for the rest of Emperor Gaz’s remains. The Gillette corporation continues the mission to catch every last Chaika. In their adventure they give a revealing account kept secret by the Emperor, which Chaika, Fredrica, Toru, and Akari decide to uncover.