Dios X'es team comprises Doom/Storm/Sentinel.
The reason why I say she's definitely a Storm fan is not just because she uses Storm but because he wears a shirt with a Storm print.
Here are some 2 youtube videos that made him the grand final's winner (previous games last year) and he's been wearing the same Storm shirt. : )
Hope he continues to use Storm eventhough Storm is not a top tier character.