While details for Ben-Adir's character are scarce, Variety reports he's been cast as the main villain for the series. It's unclear whether Ben-Adir's character will be Kree, Skrull, or something entirely different, although Talos spoke of Kree sleeper cells in Far From Home and the Kree were the villains in Captain Marvel. A possible candidate is Kl'rt, a devoted Skrull Empire solider who eventually became the first Super Skrull in the comics.