Cortana (Halo original trilogy)

Cortana is a secondary protagonist of the Halo video game franchise. She was voiced by Jen Taylor.

Why She Rocked

 * 1) Jen Taylor did a great job voicing her.
 * 2) She frequently helps out Master Chief and the UNSC.
 * 3) She is considered a 2000s video game sex symbol.
 * 4) Cortana is one of the most memorable fictional artificial intelligences, to the point that Jen Taylor voiced a real life AI known as Cortana for Microsoft.
 * 5) She had good chemistry with Master Chief.
 * 6) She served as an equip-able voice for Firefight in Reach.

Bad Qualities

 * 1) She was Flanderized since Halo 4, to the point where her rampancy was her dominant trait.
 * 2) Her usage of British slang in Combat Evolved is uncharacteristic.