Which word describes someone who is overly dramatic?

The term "histrionic" specifically refers to a person who is excessively dramatic or emotionally expressive, often in a theatrical manner. This character trait is typically associated with a tendency to draw attention through exaggerated emotions or gestures, which can sometimes appear insincere. This makes "histrionic" the most fitting choice for describing someone who is overly dramatic.

The other terms do not convey this meaning; "myriad" refers to a countless or extremely great number of something, "meager" describes something that is lacking in quantity or quality, and "obfuscates" means to confuse or make something unclear. None of these options align with the idea of someone being overly dramatic, which further clarifies why "histrionic" is the correct choice.