Bianca Barclay (Joy Sunday) is one of Wednesday‘s most important characters, with both her backstory and powers being important elements of the Netflix series. When introduced in season 1, Bianca already had a reputation of being one of the most popular students at Nevermore Academy and became a rival of Wednesday Addams (Jenna Ortega). However, Bianca and Wednesday gradually put aside their differences and began to trust and respect each other, and even worked together during Wednesday season 1’s ending.

https://screenrant.com/wednesday-bianca-barclay-backstory-powers-explained/