unabashed

Unabashed describes someone who shows no embarrassment, shame, or hesitation about something that might typically cause self-consciousness.

An unabashed liar lies without any apparent guilt; an unabashed fan expresses enthusiasm openly and without restraint.

The word often carries a note of boldness or defiance—someone unabashed refuses to be cowed by social pressure or disapproval.

She was unabashed in her criticism of the committee's decision.