She is a yellow lemondrop. She wears a pink bow on her head as well as pink shoes.
Lemondrop seems to have the personality of any other little girl. It may be implied that she is a toddler, as shown by her "chopped" sentences and voice.
She does get very offended whenever people get angry at her, going as far to take her anger out on others, as shown in "Apple's in Trouble" when she constantly interrupted her teacher Mrs. Root Beer Float.