Give this girl an alignment

[hamishspence]

The PHB, on Law vs Chaos, states Neutral characters "feel neither a compulsion to obey nor to rebel".

So people with a compulsion to rebel (even if they try to suppress it most of the time) might be more likely to be Chaotic.

So, if she's got a compulsion to rebel, and this is part of why she breaks the masquerade, she's more likely to be Chaotic than Neutral on that axis.

"Pragmatism" can be Evil or a sign of approaching alignment shift away from Good, if it goes so far as to involve committing evil acts because it's the easiest way to get what you want.

If not, it may not make a difference to alignment.

If she protects the innocent, and makes personal sacrifices to help strangers, even if she does so "because it's fun" a case can be made for Good alignment rather than Neutral.