They once again tried to make her sit with them during lunch, but again she turned them down. Considering they both didn't like her friends, and mocked her fashion style.
So now as a result, they try their best to sabotage anything Blythe tries to do.
Brittany and Whittany are two spoiled and rude teenage twins. When Blythe first came to town they tried to genuinely be nice to her, but they also took the time to criticize her and her ideas as they honestly didn't seem to like it. As a result, she refused to go shopping with them, which made them angry considering the fact nobody has ever told them no before. They tried again later, but once again had criticized her and commented on her friends and fashion. Since then they have become Blythe's rivals instead and try to do anything they can to either ruin her plans or shut down the Littlest Pet Shop. Unfortunately for them, they are not very smart and as a result, their plans often fail or mess up. Whittany seems to be the smarter one of the two however, as she comes up with the majority of their plans, where as Brittany tends to space out on occasion. However, in "Door-Jammed" it is implied that Whittany may be more accepting of Blythe, but often treats her badly because Brittany strongly dislikes her. This may indicate that Brittany is actually the more malicious of the two, or may of been a ploy by Whittany to avoid an awkward situation with Blythe whilst remaining trapped in her bathroom. Brittany is however sometimes shown to be quicker to insult or degrade someone before Whittany does, such as being the first of the twins to insult Sue in the department store in "Penny for your Laughs", and the first to approach Blythe on the street in "Door-Jammed", also managing to be the first to insult her during that confrontation. Both seem to get in trouble often, as during the first episode their dad reminds them to try not to get expelled from school. The two seem to be under the impression that many people like them and want to be their friends. Despite this, they don't appear to have any.
The twins appear to have a very distant or shallow relationship with their father, as the two have been shown to not even know what a parent is or what they're supposed to do. Their father is shown numerous times trying to teach the twins lessons of hard work and trying your best, however the twins seen too apathetic to care for the most part.
They are so mean that even the pets at LPS show hostility towards them, like in the second part of the pilot, "Blythe's Big Adventure: Part Two", where Russell prevents them from ruining the pet fashion show.
In "Trading Places", Russell gets mad when he overhears them insulting Blythe and him.
In "What's In the Batter?", Sunil expresses his anger towards them by wanting the pets to form an angry mob to attack them after he and the pets witness the twins being rude to Blythe.
Their hostility towards them becomes major in "Bakers and Fakers", where they stop them from cheating in the baking competition after they stole Blythe and her friend's recipe and design card.