What characterizes a "tetchy" person?

A person described as "tetchy" is characterized by being easily irritated or annoyed. This adjective conveys a sense of sensitivity or quickness to respond with irritation, often over minor issues. Typically, a tetchy individual may display a short temper or frustration in situations that would not bother others as much. Thus, the essence of being tetchy lies in that ready-to-react annoyance rather than maintaining tranquility, joy, or indifference to emotions, which differentiates it from the other options.