X-Men: the Irregulars

In the original Marvel X-Men series, as readers and viewers, we often see content about mutants being discriminated against and feared by humans because of their mutant abilities. But I want to create a more immersive visual world, that is, what if a child born to mutant parents is indeed an ordinary human being? The protagonist, Caiden Summers, is the mortal son of the famous X-Men couple Cyclops (Scott Summers) and Phoenix (Jean Grey). He has a mutant sister who inherits the dual abilities of his parents. How will the protagonist Caiden protect his sister and survive after his parents were possessed by the Phoenix Force (Dark phoenix Saga and Phoenix five) and destroyed the earth?