She was a witness for Austin's court case in Tunes & Trials. She wanted to buy Ally's new song, but in the end, she lets her sing it. In Tracks & Troubles, she is Starr Records' new recording artist. She yells at Austin for breaking up with her, but she bought the lie and forgives him. In Partners & Parachutes, she overuses the word 'boyfriend' around Austin, making him uncomfortable. In Chapters & Choices, Austin asks her to be his girlfriend, and at the end of the episode, just after Auslly kiss, she comes and accepts Austin's offer. In Campers & Complications, she and Austin break up after discovering that Austin has feelings for Ally.
Also in that episode, she thinks that Austin and Ally like each other, and becomes Austin's girlfriend after being convinced otherwise. By the next episode, Girlfriends and Girl Friends her bad breath was gone. Because of that, Austin does not want to kiss her. She plays Austin's love interest in a music video, but she has horrible breath.
Kira Starr is first introduced in Ferris Wheels & Funky Breath.