This version of Mission Stardust can only be found in the SimPE game files of Four Corners, one of the neighborhoods shipped with The Sims Life Stories. She appears to be a prototype of the playable Mission, who can be found in the Family bin at the end of Riley's story. The hidden Mission's bio is a shorter version of the playable Mission's. It also includes a typo where "wherever" is misspelled as "weherever".
Both versions of Mission are 29 days away from becoming elders, and they are both employed as Fast Food Shift Managers in the Culinary career. They have the exact same personality and skills. However the playable Mission has the Pisces zodiac sign, while the hidden Mission has the Taurus zodiac sign. Their interests and turn ons/offs are also different. Also while the playable Mission wears makeup, a purple variation of Bella Goth's top, and tight black jeans, the hidden Mission wears a purple dress and no makeup.