adventurer
From LSJ
ὁμοῦ ἦν καὶ ἔχειν τὴν πόλιν καὶ τὸ γένος ὅλον μετὰ τῆς πόλεως → it was much the same thing to have the city and to have the whole race together with the city
one who dares: P. κινδυνευτής, ὁ, τολμητής, ὁ.
impudent impostor: use P. and V. ὑβριστής, ὁ.