Janine "Janey" Powell, (Note: Powell is her last name in Bart Simpson's Guide to Life , Henderson is her last name in the episode "My Fair Laddy").
Janey is noted as "Lisa's fair-weather friend" and this is probably an accurate description. Though she is sometimes seen hanging out with Lisa, other times she teases her along with the other children. She is not nearly as intelligent or nerdy as Lisa. She once blew a bubble with chewing gum rather than engage in Lisa's conversation.
Janey has spent the night at the Simpsons' house and Lisa is seen watching cartoons at her house on numerous occasions. She is also seen reading "The Babysitter Twins" with Lisa.
Janey may have had a crush on Milhouse Van Houten, whom has a crush on Lisa.
When Janey Grown-Up has been confirmed to be in "Super-Jariel" all Of the SupperNess are a little bit different from how we know them. It is said that Kath Soucie may be reprising her role as her.
Anna Faris (Chipmunk Voice)