Let's say I know a person that unabashedly engages in behavior that is seen as undesirable (but not necessarily immoral or eccentric; for example, someone that is very brazenly nerdy). I am specifically focused on this person exhibiting such behavior without embarrassment or regard for others' opinions, i.e. someone that is not afraid to stand out. Is there a word (noun) for such a person, preferably one without strong negative connotations?
Some words I think don't quite work:
"Nerd" (and e.g. "geek", "dork", etc.) suggests a specific behavior/trait that isn't correct for my usage, and doesn't usually suggest brazenness.
"Reprobate" has strong overtones of immorality. "Libertine" similarly has negative connotations.
"Rebel", "renegade" and "maverick" all suggest that the person is actively violating rules, which isn't necessarily the case (and, again, are often seen as negative).
brazen (adj.) Old English bræsen "of brass," from bræs "brass" (see brass (n.)) + -en (2). The figurative sense of "hardened in effrontery" is from 1570s (in brazen-faced), perhaps suggesting a face unable to show shame. To brazen it "face impudently" is from 1550s. Related: Brazenly.