Olivia Mears is a fictional character of the series American Dragon: Jake Long. She is voiced by Liliana Mumy. She first appears in "Fu and Tell" in Season 1 and makes her only appearance in Season 2 in the episode "Switcheroo."
In Season 1, Olivia has carrot red-hair tied with blue bows into two curly pigtails. She wears a long baby blue dress under which she has a sweater of a darker shade. She also wears blue sneakers.
In Season 2, Olivia gets a drastic makeover. Her hair is now of a darker color, somewhere closer to being natural red. She ties it into a high ponytail with a blue scrunchie. She now wears the school uniform, which is composed of a plaid blue skirt, a plain white vest, knee-high socks and black shoes. Olivia also has freckles on her cheeks and wears white earrings.
Olivia Mears is a pesky little girl who will stop at nothing to get everyone's attention. She is very cocky and snobby, and likes to brag about her accomplishments and gifted abilities. She will not hesitate to resort to foul play in order to get what she wants. She also uses intimidation and looks at others from up-high to keep anyone from challenging her. Olivia is an overall competitive and mean little girl who wants to be perfect in every way in the eyes of adults.
Relation with Haley Long
Olivia considers Haley her rival in her goal to become as perfect as she can be and will stop at nothing to be better than her. In "Fu and Tell", she openly insults Fu Dog and insists she is the best at show-and-tell. In "Switcheroo", she keeps dissing Haley in order to get her morale down, although this kind of intimidation simply infuriates Haley. Olivia is not afraid to get into trouble or to physically hurt others, as shown when she purposely trips Haley (although it was Jake in his sister's body at the time) during a dance audition right into the piano.
- In the episode "The Doppelganger Gang" (Season 2), Fu Dog mentions during a tea party with Haley that Olivia busted her Party Patty Doll Beach Time Convertible and blamed it on a girl called Chelsea Fluderman.
- Olivia Mears has the same voice actress as Mertle Edmonds from Lilo and Stitch.
- In Season 1, she notably looks just like Suzy Johnson from Phineas and Ferb.