Bertholdt Fubar, along with Reiner and Annie, he is a person that possesses the ability to transform into a Titan and serves an as-yet unrevealed group. Bertholdt's Colossal Titan form is one of the more heavily deformed Titans seen in the series - it appears to lack skin entirely and its jaw and facial structure seem to be heavily altered from the human form. It is also constantly releasing jets of steam from the surface of its body, in a manner that parallels Bertholdt's frequent nervous sweating. Its feet are also quite different to those of a human and other Titans, as they are swollen and pillar-like in appearance. Its physiology is modeled after the male sex, but like all Titans, it lacks obvious sexual organs!