Okay, so the female protagonist’s name is Serena,and the legendary Pokémon from X’s name is Xerneas, right?

Did people notice that XERNEAS's name, mixed up, is actually SERENA with an extra X?

S E R E N A

X E R N E A S

and according to Kingdom Hearts, a Nobody’s name is “an X plus an anagram of their original names from when they were humans.”

So, that would mean that Xerneas is Serena’s Nobody