What do you call a person that can humble a person quick

Answer 1

A person who can quickly humble someone might be referred to as a "humblebrag," "straight-talker," or a "reality check." More informally, they might be called a "truth-teller" or a "grounded individual." If the person does this in a critical or harsh way, they could be described as a "critic" or "skeptic." The exact term can depend on the context and intention behind their actions.