Selphie most often wears a yellow mini-dress. The dress is a miniskirt/overall hybrid with clasps over the wearer's shoulders, clip at the front, a frontal zipper that travels the full length of the dress and it has two large pockets over the buttocks. She wears a silver pendant that resembles a miniature replica of a poker machine reel, and upon her left wrist she wears a blue strap. She wears brown cowboy boots that reach about mid-calf to complete her everyday ensemble. As a SeeD, Selphie wears the standard SeeD uniform.
Selphie is childish, upbeat, hyperactive sort, always looking to have some fun. Though she appears cute and ditzy, she is by no means unintelligent and is, in fact, talented with computers and vehicles. Throughout the game Selphie runs her own website, is the head of the Garden Festival Committee, disarms and reprograms missiles, and instantly picks up the controls of a foreign airship and pilots it near flawlessly. She often says a lot of cutesy things and has become a fan of combining words to form new ones. Selphie is known for her twisted logic and dark sense of humor, sometimes displaying it in a way the others are not comfortable with.
It may be that her cheerfulness is born of desperation, out of a fear of acknowledging unhappiness, a trait caused by her lonely time as an orphan, as when the party visits Trabia Garden, she tries to be cheerful while talking to her friends' graves despite being emotionally shattered. Her comrades welcome Selphie's presence as she is a loyal friend and enjoyable company, so long as she is not trying to get them to join the Garden Festival Committee. Selphie tries to make it her mission to bring Squall out of his shell and is also known for her obsession with trains and music.
Though bubbly, she is not rebellious and carries out orders in her characteristically friendly manner. She never backs down from a challenge, even if she does not always think it all the way through. Seemingly blissfully ignorant to the gravity of a situation often lifts her companions' spirits, distracting them from the seriousness of their problems.