CAPTAIN VERONICA DARE [Voice Impression: Tricia Helfer]: 

Official Depiction Overview [How she is presented in the canonical work]:

Veronica Dare first appeared in Halo 3 ODST, she is introduced as the Office of Naval Intelligence operative taking command of Alpha-Nine, and additionally she is the "will-they-won't-they" love interest of Edward Buck. As the game commences, the drop-pods spiral out of control and the squad is separated, players embody Buck during a mission attempting to reach Dare but he finds her pod empty. Meanwhile, she has headed underground, in search of her true mission, reclaiming the city AI's data core. The Rookie finds her first and the pair discover Quick to Adjust, an alien bio-supercomputer which downloaded the data core into itself. After meeting up with Buck the trio escort the alien down the highway and via a stolen ship, off the planet. After the events of the game, Dare is posted on Quito Station along with the rest of Alpha-Nine. During this time, the alien, now called Vergil, is interrogated about what it knows of the Covenant's intentions, however it harbors another secret, and Vergil only trusts Rookie and Dare to keep it. She maintains a somewhat night and day balance of semi-hostile and energetic throughout her character-arc, especially with Buck. Though during scenes with Rookie and Vergil she has a much more calm demeanor.

Our Depiction Overview [How she will be presented in our film]:

Many of the lines featured in the film will be borrowed from the game in order to refresh the audience on the events that took place. However, Dare will also play a significant role in the later segments, as she will be a representative of her section of ONI during several covert meetings. One of the four characters involved in these meetings may be able to "supervise the mission" and therefore have additional lines throughout querying Rookie's discoveries or providing direction and orders.

How She Sounds

Her voice as it's depicted in the official media can be heard in its entirety in this video;
https://www.youtube.com/watch?v=H_UZBdysv6M

Dare seems to have a mild Canadian accent, although I could be wrong, I'm not all that familiar with American accents living down under! She has a tougher voice than some of the others. I think I'll let the video speak for itself though!

Ultimately I'm open to hear different interpretations of her character.

I look forward to hearing your auditions!!