Julia is a new character introduced in Metal Slug Attack.
It is presumed that the two are dating, given that Jr. has a tattoo stating "Love, Julia" on his left arm. She also acts much like him in battle, using similar weapons. However, she also shows a soft and caring side towards her soldiers, not wanting any of them to be killed or captured by the Regular Army.
First seen in the Extra Ops titled "Same Direction", Julia finds Allen Jr. taking a shower (following his repeated defeat at the hands of Walter Ryan), and becomes upset that he abandoned his soldiers and also let the Formor+ and Keesi III+ fall into the hands of the Regular Army. She shames him into accompanying her back to the battlefield, where they repel the occupying forces.
After driving away the Regular Army, she's informed by a soldier at the front that they've recaptured the Formor+ and Keesi III+. She prepares to address the men, but Jr. interrupts her to take the glory for himself. He claims he left to find her, and that the retreat saved their soldiers from becoming prisoners. The men are skeptical, but Julia saves him from humiliation by "agreeing", calling him a genius. As they celebrate, Julia is embarrassed as Jr. lifts her up in front of them, and when asked to share a shower she responds by slapping him on the cheek.
She later appears in the Extra Ops "United Front", where she is stationed in the desert as part of Morden's global attack. After battling Dragunov, she makes a hasty retreat as ordered.
- While Julia's illustration shows her with blue eyes, her victory animation seems to show her with green ones instead.
- She is the ninth Metal Slug Attack character to ride a vehicle. The others are El Dorado, the Professor, Dragunov, Veronica, Aileen, Sisilia, Rapid, and Towa.
- In MSA's game files can be seen that Julia originally was going to get off of the car instead of get defeated right there, her animations are similar to Allen O'Neil and Allen Jr.'s ones. It is later reused as a sprite for "Special Julia".