Percier is an original character exclusive to Metal Slug Attack.
A small girl with green hair, she considers herself to be the "eternal assistant" of the Professor. She didn't share his interest in Martian technology, however, and he abandoned her while leaving the Rebel Army. Upon his return (a brief raid to rescue a captured Marty), she promptly donned a Mars People costume and rejoined his side.
Her infobox states that she wears the costume to compete with the Martians for the Professor's affection; he, however, finds her to be boring.
- Along with Heidern, she is one of the few purchasable units that makes a cameo before their debut.
- Similar to Abigail and Annette, Percier has an alternate victory animation if another character (the Professor) is in the same deck as her.