12 is the 13th Episode of the parody series, Youjo Shenki.
Viktoriya Ivanovna Serebryakov was writing a diary, starting by introducing herself. Then, a brief introduction for Tanya Degurechaff and how Visha admires her. A flashback take place of Tanya talking to her Battalion members, Matheus Johan Weiss, Viktoriya Ivanovna Serebryakov, Wilibald Koenig, Rhiner Neumann and Vooren Glanz. They state how effective Tanya's trainings were, also how strict and hellish it were. However, Tanya does not recall this memory, causing the five to burst into laughter.
Tanya then stated that she expects further growth from the Battalion as they are entering fiercer wars. As they grow, Tanya will grow physically as well. Tanya joked that if there is anyone who falls for a innocent little girl like her, she will cut that person.
The flashback ends, Visha had a small guess that that god must had loved her so much to make her such perfect person.