Hannah Montana Live On the Best of Both Worlds TourAmber Addison (Shanica Knowles) and Ashley Dewitt (Anna Maria Perez de Tagle) are two of Miley's enemies who are mean to her in school but, as viewers later find out, are fans of Hannah Montana. Her best friend is Lilly Truscott (Emily Osment). Miley does not tell Amber and Ashley her secret. Later, she gets more accustomed to her school and even meets a famous teen actor named Jake Ryan (Cody Linley) with whom she has an on-off relationship.

Miley's comic persona is known for being deadpan. She also has a few phrases that she often uses, such as "sweet niblets!" (usually when frustrated or in panic), "say what?!" and "oh, yeah, I went there."

Stewart often has to contend with people liking Hannah Montana but disliking her as Miley—and vice versa.

Like many girls her age, Miley tends to get jealous from time to time, especially when she feels that members of her family or friends are being taken away from her. She sometimes resorts to extreme measures to remedy these situations.

Miley also has a stuffed bear named Beary, which is seen in many episodes. She has had Beary ever since she was two (as was revealed in "Me and Rico Down by the Schoolyard") and according to Miley, has been with her through everything. Beary is destroyed in the episode "(Bye Bye Ball)", when Jackson tries to kill a wasp with it, but, later in the episode, he fixes the stuffed animal to make Miley happy.

Miley imagines three alternate looks for Hannah and actually manages to adopt one; "Half Dolla Hannah", a Hip hop stylist; "Techno Hannah", a Retro stylist; and unruly, angry punk-type personality, "Anti-Hannah." She later decides to stay with the original look for Hannah, as that's the one that Hannah's fans like.

Miley is a fan of Jonas Brothers, but, after her father spends some time with them, Miley dislikes them. She and Lilly pretend dressing as male singers as "Milo and Otis".[14]

It is revealed in the episode "Song Sung Bad" that Miley has arachnophobia or fear of spiders. In the episode "Joannie B. Goode," it is also revealed that she has ophidiophobia or a fear of snakes.