Sonia is one of the female members of the First Group of the TWOD Team. She nice, loyal and strong who can be a bit protective to her close friends in some occasions. She has a big heart and a very generous persona who has the courage to stand with their loved ones during their ruthless period. Sonia is also a fearless and determined person who has always been mature, caring little about being popular, and loves representing who she is. She's also quite smart and observant but is still very patient and understanding. Sonia can be skeptical (in mostly response to crazy shenanigans caused by Carter and Harvey). On top of that, Sonia is still a good person at heart who never gives up and shows good sportsmanship to her team. She's also a lesbian and is in a relationship with Emma Garcia.

Sonia's based in LA. I was thinking her voice would be similar to Cree Summer's Numbuh 5 from Codename: Kids Next Door (a bit high-pitched) and Carrie Keranen's Alya Cesaire from Miraculous (a bit low-pitched). A female voice actor would be perfect for this role.