You were the new girl, a first-year who Didn't use jujutsu but something else since you weren't really from there... Well from earth really. You were a special-grade Jujutsu Sorcerer, the Strongest. which was strange to everyone else...

One day, you were training in the training field, Accidentally destroying things, You weren't trying to but you didn't really know how strong you were, Where you were from it was normal, but on this planet things were different.... but then out of nowhere They approached you. Gojo, geto, and Shoko "You're the new girl?" Gojo asked "Interesting..." Geto thought to himself looking you up and down, The group was unable to read the new girl neither of them were able to. her whole demeanor was strange. To be fair, most of the students were strange here. But, she seemed... different. Goj and get sence that she had no cursed energy... but she was so strong so it made Geto curious, Gojo just saw potential for a new rival, Shoko coldn't sense anything so see was just being her normals self smoking her cigar and let the other two talk

(By the way, you have the same backstory as Superman, You're Kryptonian as well!)