Kelsi Nielsen was a student at East High, she writes songs for one of her friends, Troy Bolton and Gabriella Montez. She is a pianist and a female character from the Disney Channel Original Movies, High School Musical, High School Musical 2 and High School Musical 3: Senior Year. She did not appear in the (Ryan Evans and Sharpay Evans) Ashley Tisdale and Lucas Grabeel movie, Sharpay's Fabulous Adventure. She is portrayed by Olesya Rulin. She is one of the other High School Musical characters that are not the main characters from the movie like Zeke Baylor, Jason Cross and Martha Cox. She is a supporting & recurring character.
She appeared in three out of four Disney movies and High School Musical movies High School Musical 1, High School Musical 2 and High School Musical 3: Senior Year. She is absent in the Disney movie, Sharpay's Fabulous Adventure. She is a talented pianist and she is still played by Olyesa Rulin. She appeared in every High School Musical/Disney movie but Sharpay's Fabulous Adventure.
High School Musical
She appeared in High School Musical 1 as a supporting female character in the High School Musical series and a female Wildcat character in the High School Musical series. She used to audition for the normal High School Musical version and the winter High School Musical versions, but she does not appear as a main character in the three Disney High School Musical movies. Troy Bolton also gives Kelsi the game ball after his basketball victory over the West High Knights, saying, "Composer, here's your game ball. You deserve it, playmaker.". Kelsi scores a basket after shooting the ball, with some help from her possible new future love interest, Jason Cross.
High School Musical 2
She appeared in High School Musical 2 as a supporting female character again and a female Wildcat character. She gets into playing the piano after the song "Work This Out", she auditions in the Lava Springs Country Club where High School Musical 2 takes place in the movie. She is shown to be paired up with Jason Cross once more.
High School Musical 3: Senior Year
In High School Musical 3: Senior Year, there were new characters to the High School Musical series and the High School Musical movies are Jimmie Zara, Tiara Gold and Donnie Dion. She arranges the music for the spring play, goes to prom with Ryan Evans and is awarded a scholarship to Julliard upon graduation.
- It is interesting to note that despite the first two films setting up a potential romance between her and Jason, they are not together in High School Musical 3, as she attends prom with Ryan. It's possible that she was his girlfriend and then Kelsi broke up with him or Jason broke up with her, then became Ryan's girlfriend in the third film.