Amy is rather temperamental, bossy and stubborn, which can make her threaten or even harm her friends for things they had nothing to do with. Amy is also vain and tends to brag about her appearance. However, she is very cheerful, optimistic, kind, friendly and a loving person who cares a lot for her friends. Pepper is a fun, comedic, and zany skunk who loves to crack jokes and play generally harmless pranks on others. Sometimes her pranks or jokes can get mean or rude, but she generally does not seem to realize this until the person she has teased or pranked begins to cry or tells her off for it. Pepper will also try to use her humor or tricks to try to perk others up when they are upset. Because of her tendency to accidentally upset others, she seems to have the most arguments with the other pets. Being a skunk, Pepper hates it when others reference a skunk's natural musk; she is not normally smelly and it only happens when nervous, scared, or angry when not getting attention from her pet friends. When excited or happy, she will release a pleasant-smelling scent instead. It has also been revealed that she can willingly spray scents if she needs to use them for some reason, much like a skunk's natural defense mechanism. She takes comedy very seriously as when advised to laugh at whatever Captain Cuddles said, she insisted it is against her principles to laugh at something unfunny. Pepper is different from the other girls because she is a tomboy, which means she is not that girly and is only interested in being herself.
- "Lovely... I just wish Sonic were here to enjoy this with me."
- —Amy on the beach, "The Last Resort"
Both Amy and Tails appeared in the second-largest number of episodes of Sonic X (73 episodes), but in a different order.
In the Japanese version of "A Robot Rebels", Amy is shown to be capable of telepathy.
Alongside Charmy, Amy spoke English only once in the Japanese version, where she quoted Sonic saying "See you later" when Chris asks her of Sonic's whereabouts.
Most of Amy's sprites in Sonic X (Leapster) are taken from Sonic Advance and Sonic Advance 2.
Originally, Amy Palant was going to voice her in the 4Kids Entertainment dub of the show as she got numerous callbacks for the character. Eventually, she would instead be cast as Tails.[citation needed]
"DO YOU UNDERSTAND THE WORDS THAT ARE COMING OUT OF MY MOUTH?!" (Blythe's Big Adventure Part One)
"What gives? You should be laughing newspaper out your noses." (Penny For Your Laughs)
"I mean, asking me to try a new shtick is like asking that bulldog to keep the slobber in his mouth." (Penny For Your Laughs)
"Maybe because you breathe as loud as Niagara Falls!" (Penny For Your Laughs)
"You know, Mrs. Twombly's whistling is so bad, the birds have to cover their ears!" (Penny For Your Laughs)
- "Every time I come up with a way to capture Sonic's heart, he makes a last-minute getaway! This is totally unfair! That trap was set for Sonic! I wanted to get my romance grown and now I have to watch you two go gaga over each other! This is outrageous! Go find your own planet to fall in love on!"
- —Amy exploding in anger, "The Planet of Misfortune"
- In Frenemies, Penny Ling mentions that Pepper's middle name is Mildred. In Pet Sounds and So Interesting, a character that could be interpreted as her owner is shown. However, according to creator Julie McNally Cahill, it is not her owner. Pepper is the third character to be afraid of heights after Sunil Nevla and Hayden. Her insult comedy shtick is similar to the late Don Rickles. Pepper sometimes enjoys doing voices, a possible reference to the late Robin Williams. Pepper has some similarities to the Looney Tunes character Pepe Le Pew and the Enchantimals character Sage Skunk. She and Vinnie are the only main pets not to have any relatives shown (not including their owners). Pepper cannot stand seafood.
Pepper Mildred Clark is a character that appears in the anime series Sonic X and its comic series published by Archie Comics. While usually friendly and caring, if she feels threatened, she can instantly turn into a heavyweight hothead. She is shown to be really stubborn and bossy throughout the series much to the annoyance of a few characters. She is Sonic's self-proclaimed girlfriend and her long-term goal is to get Sonic to ask her out on a date.