Paulina Sanchez is a Hispanic cheerleader and the most beautiful and most popular girl at Casper High School. She is shown troughout the series to have a very bad obsession over Danny Phantom (even being delusional as to marry him).
Since she is Hispanic she has dark tanned skin and has a Spanish accent. She has black hair that reaches her waist and dark teal blue eyes. She often seen wearing the most fashionable outfits in demand. Sometimes the clothes she wears is just as bad as Princess's clothes if not worse.
Paulina is extremly shallow and viscious in nature. She is most defiantly vain, sadistic, spoilt, insensitive, self-centered, and usually mean to anyone below her standards. Described as shallow by Sam, she only cares about popularity and beauty. Paulina is willing to use others for her own benefits, like going to the dance with Danny in order to make Sam jealous in Parental Bonding. She also only gives Danny and his friends invitations to her birthday party because Danny Phantom usually appears when they're around, even asking Phantom to take an invitation so that she can uninvite them Memory Blank. There's moments where she can be extremely heartless, such as treating Valerie negatively after Valerie becomes poor. Whenever angry, Paulina has no issues taking action for revenge, trying to attack Danny for choosing Sam in the pageant in Beauty Marked and chasing after Tucker because she has faint memories of him making her wash his feet in King Tuck. Contrary to her usual behavior, Paulina is able to be nice on occasion. She is genuinely thankful for Danny Phantom saving her, and likes him beyond just his good looks and popularity, but also his heroism and kindness. When her satellite friend Star disappears in Claw of the Wild, Paulina is very worried about her, especially if Star gets sunburned. Depending on the situation, she is willing to help, shown when she helps disguise Tucker as an adult and fights Youngblood's Crew to save her parents in Pirate Radio. Even after finding out that Danny Phantom is actually Danny Fenton in Reality Trip, she accepts him while helping him and his friends get away from the Guys in White.
Paulina is first seen in Parental Bonding, all of the boys fawning over her. Danny plans to ask her out to the school dance. When she makes fun of him, Sam comes over and insults her. Planning to get revenge on Sam and thinking Sam has a crush on Danny, Paulina accepts Danny's offer, who gifts her an amulet. Danny finds out later that the amulet is enchanted, and attempts to take it back from her during the dance, using the excuse that it belongs to Sam. While Danny's overshadowing his father, Sam goes into the bathroom with Paulina, explaining that she only sees Danny as a friend and would like the amulet back. Paulina gives it back, revealing her cruel reason for going to the dance with Danny and announcing her plan to ditch him. This angers Sam enough to turn her into a dragon, scaring Paulina enough into making her faint dead away. As the dance finishes up, Dash is seen flirting with Paulina, but Sam lets go of her issues with Paulina for the time being. Paulina is one of the humans that Walker and his goons overshadow in Public Enemies. Meeting Danny Phantom after he saves her, Paulina realizes that he's a good ghost. She begins to have feelings for Danny after this experience, decorating her locker with pictures of Danny. At the water park in Lucky in Love, Kitty overshadows her and starts dating Danny after pretending to find out his secret. After he discovers what's going on, Danny saves her again, much to her increasing gratitude. In Reality Trip, Paulina and the rest of the world find out the connection between Danny Fenton and Danny Phantom. She, along with the rest of the popular kids, helps him and his friends escape from the Guys in White and kisses him, putting Sam into a white-hot jealous rage.