Hadassah is described as ten feet taller than Hiram , who is eighteen feet tall , so she probably is about twenty eight feet tall. Just like her brother, she has five heads, but unlike Hiram's all of her heads are the same color: green. Sometimes all of her heads speak simultaneously (overlapping, not in unison). She is able to breathe fire .
Hadassah was approached as a potential juror for her brother's trial, as she was the only five-headed dragon available for jury duty. She didn't like the idea of being the juror for her own brother . She stayed in Night Vale, but in the end she wasn't allowed on the jury, being a family member of the accused .
Some time after Hiram was sentenced to death, Hadassah brought several five-headed dragons working as lawyers to Night Vale in order to appeal her brother's sentence. As the dragons arrived, several bulidings were destroyed, including Pinkberry, which was nearly burnt down .
During the negotiations concerning her brother's sentence, Hadassah and her team of lawyers argued that Hiram is a citizen of a world inhabited by five-headed dragons and as such should be tried and punished in his own world. When mayor Cardinal didn't agree to this, Hadassah destroyed most of the city, including the City Hall. After this, the negotiations were resumed .
When mayor Cardinal refused to cancel Hiram's execution, Hadassah and her team of dragon lawyers expressed their dissatisfaction by breathing fire. This resulted in the dragons being confined to an electrified Free Speech Cage . After Hiram's Violet head was killed, Hadassah and other dragons dug a cave under Ralphs and moved there, claiming that they will not leave Night Vale until they get retribution . She later staged a several week long protest, holding up signs and attacking anyone attempting to enter or exit the City Hall. She claimed she wanted justice, by which she meant she wanted Night Vale to suffer as much as she did . The dragons then proceeded do crush local businesses, eat pets and set fire to public parks, they were also seen visiting the court of the Distant Prince .
- Hadassah seems to be immune to the influence of the Glow Cloud, not hailing it even when other dragons do .