The antonyms for the phrase "takes on character" could be described using various terms such as blank, faceless, generic, insipid, and vapid. When something lacks unique characteristics and personality or does not evoke a particular feeling or emotion, it can be termed as faceless or generic. Alternatively, if something is uninspiring, unexciting or insignificant, it can be referred to as insipid or vapid. In contrast, something that takes on character is lively, full of life and vibrant. Therefore, the antonyms for "takes on character" can be used to depict objects, people, or situations that have no distinctiveness, life, or interest.