Wen is a young girl in fourth grade who has trouble falling asleep as seen in the episode Sheep Deprivation. She is voiced by Lauren Tom.
Wen is a small young girl, she's Asian American and she has elongated eyes with eyelashes. She has black hair with purple highlights and she normally wears a pink onesie when going to bed.
Wen works herself to the bone, she constantly makes lists of the things that she needs to get done and is exhausted when she has to add more things to her list. She typically overwhelms herself to the point where she's unable to sleep and wants to continue to finish off her list. Wen also questioned reality when she was in her dream and tries to find a logical explanation for everything.
Wen is voiced by Lauren Tom who also voices other cartoon characters with Asian ethnicity like Amy Wong from "Futurama", Minh Souphanousinphone from "King of the Hill", and Numbah 3 from "Codename Kid's Next Door".