Sweetie is antagonistic, sneaky, greedy, and spoiled rotten. She often pretends to be nice when around the princess and earl to trick them. She doesn't appear to be afraid of the PAW Patrol as she has invited and mockingly told them to catch her after stealing the Barkingburg royal crown. She also uses her cuteness to trick others into getting what she wants. When Sweetie laughs, it usually ends with a snort. She is a picky eater and hates fish, bananas, and normal dog food.
She is ambitious and determined. She refuses to give up on her goal to become the queen of Barkingburg. Her overconfidence is often her own undoing because she sometimes fails to foresee how her plans could go wrong.
She owns a robotic toy frog named Busby, whom she considers her minion. She often talks to "him" when she's alone.
When her plans go wrong or she is punished, she tends to blame others for her mistakes, primarily directing her anger towards Busby.
She is rather indifferent to the Princess and has no qualms with backstabbing her and/or taking advantage of her naivety. However, in "Jet to the Rescue", she revealed a more anti-heroic side and was not happy when she saw that the Princess was in danger, showing that she has standards and that she actually does care for her owner. She saved the castle from floating away. At the end, though, she tried to nab the Princess's necklace, meaning that she hasn't gotten over her greed completely. She did stop when she was given a new tiara, much to her delight and gratitude towards the Princess, as she participated in an airshow with the PAW Patrol as part of Skye's birthday present for the Princess.
Sweetie is a smaller puppy (around Skye's size). She has white fur, purple eyes, pink eye shadow on her eyelids, and a dark brown nose. She has pointy triangular ears with fluff on the inside and fluff on each of her cheeks. Some fur acts as her bangs. When in her Mission PAW uniform, her bangs are slicked back into a new hairstyle.
Her casual outfit is a magenta tiara and a magenta collar with a pink "crown" attached to it. The "crown" acts as a remote control to control Busby and it glows when activated.
Her Mission PAW uniform is a black suit with pink and white trim. Instead of a normal Mission PAW or PAW Patrol pup-tag, she wears a crown pup-tag.
Her pink vest is rose with lighter rose details like her Mission PAW uniform. Her Jet Rescue uniform is rose with black undertones and teal highlighting the helmet, visor, and her collar. Her pup-tag is now silver. She is given a different tiara, which appears golden with real jewels, in "Jet to the Rescue".
Her pup-tag consists of a magenta collar around her neck with a pink crown.
Sweetie's pup-pack contains a pincer claw similar to Rocky's, but in a different color and a long vacuum snatcher, with a selfie stick.
Sweetie's vehicle is a purple roadster that can transform into a flying helicopter / car. It has the ability to unbuckle Sweetie upon command. Her jet is purple with teal highlights.