Kira Nerys and Jadzia Dax, shown here in Season 1 telling Quark to stop messing around and cooperate, which he does, because they're awesome and terrifying.
She's flying the Defiant in battle. While the Bridge is on fire. Yeah, that's badass.
Here, Jadzia faces the blade of a legendary Klingon warrior to earn the right to join a quest of vengeance. When you're a skinny young Trill and have Kor, Kang and Koloth taking you into battle as their equal, you're awesome.
Bedecked in questionable 21st century fashion, Jadzia goads the conservative head of a news network into ruining his career to make history.
This is any one of three thousand times Kira kicks ass and takes names. She does this three times before breakfast.
It should be noted that Kira lays this Klingon flat out after he stabs her in the spleen.
Kira faces down a Romulan fleet with a dead man's gambit for the safety of Bajor. She wins, of course, and schools a Federation admiral in the process. CASE CLOSED.