(Shiganshina Arc)

Bertholdt is a main antagonist from Attack on Titan. Originally from the nation of Marley, he became a Warrior candidate as a child and after passing, he was granted one of 9 special Titans that being the Colossal. Growing up around his closest comrades Reiner, Annie and Marcel, he would later be given the mission of infiltrating the island of Paradis alongside them to retrieve the Founding titan. After a few complications, they infiltrated the ranks of the Scout Regiment during their mission and gaining the trust of the others there. In the process he managed to breach two of the walls using his titan. After a lengthy stay there the identities of him and his comrades were exposed resulting in he and Reiner fleeing to Shiganshina to hopefully ambush the scouts and take the Founding titan from Eren.

Bertholdt is a rather tall, slender man being the tallest of his fellow peers. He has short, black hair, pale green eyes, thin eyebrows and an elongated face. He was seen mainly in his cadet uniform, and after he entered the Scout Regiment, he wore their uniform with the green hood on missions. He was also noted by others to always be sweating. In his casual clothes, Bertholdt wore a blue sweater with a white button down underneath and tan pants, though he later switched to a pale blue button down with gray pants. His titan is the tallest at 60 meters but appears skinless with only visible muscles and tissue while retaining his silvery eye color. The limbs are slightly disproportionate with the arms being slightly longer and skinnier and the legs are thicker like pillars.

Being an Eldian, he is capable of becoming a Titan but he was granted the Colossal. His titan is rather sluggish but is capable of producing intense steam as offense and defense and upon initial transformation can cause a devastating blast akin to a small city-wide nuke all based on the user controlling the initial blast, also able to reduce it to instead a decent sized bomb blast. Using the titan however uses a lot of stamina and requires a lengthy period of rest before transforming again. As a titan shifter he also possesses a form of regeneration which activates based on the holder's will to live.