Merris is a character introduced in Metal Slug: Commander.
Merris was raised in a church as an orphan when her parents died during the war. One day, she realized her potential talent as a soldier and joined the Regular Army. Her outstanding performance in the army lead the instructors to appoint her as pilot for a new machine.
Despite her skills and constant training, Merris has constant reminders of her past as a war orphan and is usually a bit shaken by it. She motivates herself by ensuring she'll end the war on her own hands to prevent a similar fate on other children.
Merris is usually seen as cool girl in public. The Regular Army tend to refer her as their "little sister". In private, she has chats with select partners. Merris enjoys drinking liquor, but nobody has yet seen her drunk.
- Although debuting in Metal Slug: Commander, Merris makes a brief cameo in Metal Slug Attack's promotional gift campaign for the former game.