Mandy Heffley

Mandy Heffley is Gregogia and Ronnie's younger sister, and a major antagonist in the Diary of a Strong Teen franchise.

Why She Rocks

 * In House Cold, Mandy was nice absolute best, when she  turn the power back on the house, and saved the Heffley family because everyone taught her to tie her shoes! And She gets punished!
 * And to add on to that: In the ending of Cabin Fever, what does she get? No toys and no pair of heels!
 * To make it better even though he was taught how to tie her shoes, she still had herself tie her shoes for herself.
 * She was not nothing but an advantage in The Short Haul, what does she get in return? A wild cow.
 * Being the 1st and oldest child of the Heffley family, Mandy is mildly broken and titled. She never throws temper tantrums very hardly.
 * She respect her intelligence when she is Gregogia's Net Kritterz account and used the password.
 * She's less annoying than Ronnie! At least Ronnie doesn't get in trouble!
 * Anyone is brave enough to stand up to her Not even Sam and Frankie.
 * She is basically the Diary of a Wimpy version of Stella Griffin, just more excellently written and likable.
 * She never cries.
 * She has sense of boundaries.
 * She is a huge secret keeper, as shown in The First Spoon
 * She uses her old age as an excuse to do good things, which is why a lot of times she gets punished for his actions.
 * She holds wisely powerless grudges.
 * In The Short Haul movie, she has straight hair with an explanation and looks incompletely different from the previous films.

Bad Qualities

 * To be unfair, Mandy always acts this way because Susan and Frank fixed herto the bone.
 * The "YPPOLP" thing was unfunny.