A demon characterized by her powers of divination and precognition, she eventually forms a friendship with Leo Wyatt (Brian Krause) and the Charmed Ones, specifically Phoebe Halliwell (Alyssa Milano), after expressing her desire to become human.

Although she was killed by the demon Zankou (Oded Fehr) on the show, Kyra is transported through time by the witch Prue Halliwell in the comics, saving her.

Media outlets compared the character to Carpenter's previous performance as Cordelia Chase on the supernatural dramas Buffy the Vampire Slayer and Angel.

[6] She later works with the half-demon Sirk (Zack Ward) on his plans to track down and kill all of his mortal relatives in order to seal his transformation as a full demon.

Longing to experience the emotions she sees in her visions, she contacts the Elders (a council of whitelighters which governs the forces of good) to make a deal where she would trade her information on a then-unknown threat, the Avatars, if she is made human.

To gain Phoebe's trust, she guides her and Lieutenant Darryl Morris (Dorian Gregory) to Inspector Sheridan (Jenya Lano), a member of the San Francisco Police Department who was placed into a coma by FBI agent Kyle Brody (Kerr Smith).

Although the Avatars were predicted to be a threat, Kyra's vision shows Phoebe and her future daughter living in a utopia where demons no longer exist.

Prue Halliwell summons Kyra from the past to better understand her new identity as the guardian of the Nexus of the All—a spiritual energy that forms the basis of all magic.

[14] Kyra witnesses Prue perform a sacrificial ritual forcing Tyler to open portals in the sky that provide the Old Ones with access to the mortal world.

[9] Prue, while under the influence of the Old One Heremus, attacks Knox Academy, a school for magic, and turns its students and faculty into hosts for demons.

[19] The Palm Beach Post's Kevin D. Thompson said Carpenter was one of the "guest-stars we can't wait to see" for the 2004–05 United States network television schedule.

She said although she enjoyed working in the supernatural genre and viewed it as familiar territory, she was hesitant about committing to the show's demanding shooting schedule as it would take time away from raising her son.

[27] When discussing the season's development, Shand said pairing Kyra and Prue Halliwell for a storyline was a "natural fit" since both characters were his favorites from the show.

[29][30] Shand identified her as part of the "straight up plot" and "inextricable" from Prue's storylines in response to fans' concerns that she would be limited to a subplot.

[1] In a Charmed Magazine article, Tara Dilullo considered Carpenter to be the perfect person to play Kyra since she had "spent the better part of her career facing down the supernatural with a snark and a smile" as Cordelia Chase.

[31][32][33] Although he enjoyed that Charmed hired an actor from a Joss Whedon show, he felt Carpenter was not given enough material and criticized her for playing the character too similar to Cordelia.

[37] In 2015, Pat Shand criticized the decision to kill Kyra and introduce the novice witch Billie Jenkins (Kaley Cuoco) in season eight.