The Queen of Hearts is a white bat with seafoam green eyes and purple wings. She wears a red and black dress.

The Queen of Hearts is very psychotic as the ruler of Wonderland. Due to this, she is the most dangerous of all the residents of Wonderland who are mad (insane) in their own ways. She is very egotistical, as she likes to hear the words "Yes, Your Majesty" and insists that "All ways are my ways!" She is also shown to be a rather childish character, even in the face of Sonic, as she is incredibly impatient, irrationally sensitive, prone to temper tantrums, and, as stated above, rather egotistical.