More recently, the possibility of an incestuous relationship involving Simba, his mate Nala, Scar and Mufasa has surfaced. According to Johnson Cheu, author of "Diversity in Disney Films: Critical Essays on Race, Ethnicity, Gender, Sexuality and Disability", the fact that Mufasa, Scar, and Simba appear to be the only male lions present in "The Lion King "suggests the possibility that either Mufasa or Scar is Nala's father, which would in turn make Nala either Simba's half-sister or cousin. However, "The Lion Guard" identifies Nala's father as a red-maned unnamed lion who-in his youth-resembled his grandson (and Scar's great-nephew) Kion. This lion was likely kicked out of the pride upon coming of age, as happens to real male lions, though not before impregnating Sarafina (Nala's mother).