Most masklike implies a persona that is artificial, rigid, and impassive. The antonyms of this phrase can exhibit genuine emotions and expressions characterized by warmth, spontaneity, and authenticity. A person who shows their true colours without hiding behind a mask is transparent, open, and candid. They are unreserved and have no reason to hide or put on a facade. Moreover, they can be described as natural, relaxed, and animated, often driven by a genuine desire to connect with others. These characteristics represent the antonyms of the phrase 'most masklike,' expressing a level of personalization, emotion, and transparency.