unmask

To remove a mask from someone.

To expose, or reveal the true character of someone.

The Charieſt maide is prodigall enough, / If ſhe vnmaske hir beautie to the Moone.

To remove one's mask.

But instead of a direct answer to so important a question, Jones began to be very importunate with the lady to unmask; and at length having prevailed, there appeared not Mrs Fitzpatrick, but the Lady Bellaston herself.

To cease engaging in masking, to cease disguising one's autism.

[…] to unmask and to assume her 'natural' role (rather than her 'fitting in' role).

Autistic females are trying to adhere to social expectations placed upon them, and masking and blending to fit those expectations, […] How do you unmask when you have spent a [long time masking].

To expose something that was concealed or shielded from an enemy.

He recalled his horse. This, retiring, unmasked the heavy infantry, which Hannibal called in from either flank and sent with a vigorous élan in close column across the ford against the ill-arrayed barbarians, followed by the cavalry, which had formed again in its rear.

In less than an hour the batteries were unmasked. The Confederate works were visible and at 5:08 a.m., Seymour ordered the batteries to commence firing.