She was one of the two sack chums, Sackboy meets after being recruited to join the Alliance in their mission against the Negativitron. She eventually succeeded in their final battle.
Sofie alongside Sebastian and their new friend Chip joins Sackboy in his journey to stop the Hoard from stealing LittleBigPlanet's prized treasure.
Sofie's costume can be transferred to LittleBigPlanet 3 If your account has data from LittleBigPlanet 2.
Sofie and Sebastian are starter costumes again in LittleBigPlanet Party. She actually plays a role in the story.
She and Sebastian appear after winning in Sackbot Park. She and Sebastian enter the worldwide Board game competition hosted by Disk Jerk-y to find out more about his plans after the destruction of the festival. They both become Sackboy's traveling companions. During the course of the story; she competes in; Larry's Haunted Library, Newton's Stratosphere, The Emperor's New Groove, Odd Lands and Disk's Game Castle.
She alongside her friends finally saved the Party Planets and got back to celebrating the Planetary Festival alongside a reformed Disk Jerk-y. In the end, She and the other two sat on a Ferris Wheel, with hands on their backs.
Sofie wears a dress with a flowers pattern and a big belt.
- She has a French accent in the movie.
- In games, her dress and floral headband changes color based on the player's Popit color, In LittleBigPlanet Karting however, it is light-blue due to the lack of Popit colors. This is brought back in LittleBigPlanet Party as not only does her costume changes but a few gameplay aspects in certain mini-games such as the Shurikens in Shuriken Stardome,Wooden Sword in Plane Fight,etc.
- LittleBigPlanet Party gives Sofie a personality as she is depeicted as a go-getter, always excited for adventure in any form. It's also implies that Sofie has a small crush on Sackboy.
- In LittleBigPlanet Party, she and Sebastian has made several nods to the LBP2 worlds.
- She and Sebastian remembers that they had their trianing in the Alliance at Larry's Hideout as they were both starter costumes.
- Upon hearing CLive's song in The Factory of a Better Tommorow, she replies, "Oh no." as she remembers meeting Clive for the first time.
- Sofie and Sebastian also break the fourth wall in LittleBigPlanet Party, as they wonder if there will be a sequel to LittleBigPlanet Karting after beating The Emperor's New groove.