Demi is an adult female pug who bears a strong family resemblance to her daughter, Pickles.
Demi's coloration is nearly identical to that of Pickles, although she has a mole-like spot of brown fur on the right side of her face.
She wears a light pink dress with dark pink trim, a white belt with a pink buckle, and a green unbuttoned cardigan with pink buttons, trim, and flower embroidery at the bottom. She also wears a pearl bracelet as well on her left wrist.
Demi seems to be very gossipy. Little else is known about her.
In Surprise!, Pickles' parents Franco and Demi, are seen talking to Princess Carolyn, who is holding her daughter Ruthie. Demi tells her husband, nobody wants to hear about his time-traveling orthodontist pitch. Franco then tells his wife she is "lighting a long fuse on a short stick of dynamite." Demi shakes her head at this. She says, "oh, whoop and a big one at that." They both then walk away.
Mr. Peanutbutter and Pickles are fighting after Mr. Peanutbutter confesses his infidelity and he retorts that at least no one in his family has anger issues. Pickles says her father has come a long way in his anger management classes. Mr. Peanutbutter then says "[Franco] is a hothead with a little pug complex." He then goes on to say everyone always makes excuses for Franco's outbursts. This angers Franco, who is listening in on the conversation. "Shushing" noises are heard in the background, and Demi restrains Franco from giving away their hiding place.
He then goes on to talk about how Demi tries to provoke her husband. He then says he thinks the couple gets off on that, and they make everyone else unwilling participants to their kinky foreplay. Pickles is grossed out by this, saying those are her parents.
Later, the partygoers come out of their hiding spots and subsequently leave.