Sonny

"Sonny" is the name given by Hanji Zoe to a Titan which is captured after the reconquest of Trost District.

Abilities
Sonny displays typical traits for a Titan of his class. He displays no intelligence. He does not appear to feel pain, ignoring a spear driven into his heart in favor of attempting to eat Hanji. He loses activity after an hour of sunlight deprivation.

Hanji describes his personality as "introverted", but this may just be projection on her part.

Story
Sawney first appears when the gate of Trost District was broken by the Colossal Titan, numerous Titans invaded the district. However, when the breach was plugged by Eren Jaeger, human forces were able to retake the district. Most of the Titans who had entered are killed, but two are taken alive; Hanji nicknames them "Sonny" and "Bean". She performs a number of experiments on them, testing their response to attempts at communication, injury, and sunlight deprivation. She has further tests planned; however, during the night, Sawney and Bean are killed by a fellow soldier who were seen by the Guards to have escaped on their 3D Gear. Annie Leonhart was revealed as the killer later in the manga.

Trivia

 * Hanji's nicknames for the two titans, Sonny and Bean, are direct references to the famous cannibal of the same name, Sonny Bean.