W.I.T.s Academy (formerly)
She was portrayed by Kaitlyn Lieber.
Though we saw little interaction, we assume she got along with Sam relatively well.
When the two first met they didn't get along, as Sophie insulted Jessie's brother. However, she, Samantha, and Jack helped pull Jessie from the vortex she created. Due to Sophie's expulsion, it is unclear where they stand.
The image gallery for Sophie may be viewed here.