Sharle's Shiganshina Diary

Sharuru no Shiganshina Nisshi (シャルルのシガンシナ日誌) is a comedic extra chapter included in the 4th volume of the Attack on Titan: Before the Fall manga, written by Ryō Suzukaze and illustrated by Satoshi Shiki.

Summary
Sharle Inocencio writes about some of her experiences with Kuklo after they started staying in Shiganshina District. She writes about Kuklo seeing a cat for the first time, notes the striking similarities between the behavior of the two, and notes that he has even started copying the cat's behavior.