|“The city's crazy, but everyone's doing their part. We may not be Ninja, but our job's important too. People gotta know what's going on.”|
|— Antonia to Nelson|
After their boss made some announcements, Antonia was paired up to help 'Lil Nelson as his first day as a paperboy.
She casually hands out papers whilst the city is under attack by Elemental Cobras. She told Nelson to do the same, much to his confusion. They eventually watched as Samurai X fight off some of the snakes and continued their route.
During their break, Antonia informed him that Ninjago is always under attack. She then offers him a sandwich after his got hit by a fireball. She then has a pep talk with Nelson, and he was able to get around the city easier.
After delivering some papers, they see Clutch Powers fall from the sky and made sure he's not hurt. Clutch then tells them that the Ninja are trapped in a pyramid before fainting and being sent to the Hospital. Antonia says he'll be fine, but Nelson convinced her they need to find help at the Monastery of Spinjitzu.
She encouraged Nelson to cross Route 23, which is a "quadruple black diamond" according to their boss. They arrived at the Monastery, and she watched as Nelson told Wu about the Ninjas' whereabouts. They then rode back down the mountain.
During Zane's message, Antonia appeared in a flashback riding her bike with Lil' Nelson and another paperboy.
Antonia is a young girl with violet-red hair. She wears a black shirt with a white lightning bolt symbol, a tan leather jacket with a red "X" on the right side, blue short shorts, black leg stockings, and maroon boots with black laces.
- She is based off of a Ninjago fan named Antonia who wrote to Brent Miller, the letter being one of her last wishes as she was ill. Tommy Andreasen saw Brent's video and sought to make her a new character.
- Tommy Andreasen tweeted a photo of Antonia and stated she will appear in Season 11.
- Along with the statement, he revealed that Antonia is a "street smart Ninjago City girl with a lot of moxie."
- This is shown when she chose to deliver newspapers instead of fleeing throughout the Elemental Cobras attack on Ninjago City.