Sonny

"Sonny" (ソニー) is the name given by Hange Zoë 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 Hange. He loses activity after an hour of sunlight deprivation.

Hange describes his personality as "introverted".

The Female Titan arc
Sonny presumably first appears when the gate of Trost District is broken by the Colossal Titan and numerous Titans invade the district. However, when the breach was plugged by Eren Yeager, human forces were able to retake the district. Most of the Titans who had entered are killed, but two are taken alive; Hange 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, both test subjects are killed by unknown assailants. Armin Arlert later comes to the conclusion that this was doing of Annie Leonhart, as he believes that she used Marco's Three Dimensional Maneuver Gear to escape the suspicion during the the investigation of the Titans' murder.

Trivia

 * Hange's nicknames for the two Titans, Sonny and Bean, are direct references to the famous cannibal of the same name, . However, the former uses an anglicized version of the name.