Omg she’s too cute!!

the mask she wear protect her identity by spell! this spell make it impossible to know is princess celestia but become useless on those a fond she this hero! but those a never fond out , the spell is very useful! everypony belive is a alicorn heros who look close to celestia but think is not celestia but were this pony fond out this alicorn mare hero is celestia , for them is mind blow! act as hero and be a princess is very hard to make sure no one fond the hero and the princess are the same pony! this why the spell is put on her but only if she wear her full suit! if the mask be remove or destroy? the spell turn off! so celestia need to be careful!

@Background Pony #3EBF  
she were a magic mask who make hard to know who wear it!

Hey, very cool costume here.

@Scpx  
I just think she enjoys wearing the costume.
 
Sides, she looks adorable and attractive in it.

@Background Pony #ACF9  
they also need no costumes to fight crime, they are already op and can enforce law through police and military

That’s gotta be the worst kept secret identity in Equestria.
 
There’s only four alicorns total. It wouldn’t be too hard to figure out who is that mysterious masked mare.