During a Splatfest, any part of Marie's appearance that is normally green will change to match the color of her Splatfest Team, including the ends of her tentacles.

Cap'n Cuttlefish's Theme• Octo Valley• Eight-Legged Advance• Tentacular Circus• Cephaloparade• Inkstrike Shuffle• Octoling Rendezvous• Octoweaponry• I am Octavio• Calamari Inkantation• Maritime Memory• Onward!• SPLAT!• Sunken ScrollIn the Splatoon 3 DLC even if they are visible in Inkopolis, they do not host the news. Instead, Deep Cut still hosts the Anarchy Splatcast. Frank, Allegra (2017-04-25). "In Splatoon 2, best friends have been torn apart". Polygon . Retrieved 2023-07-26. Frank, Allegra (2017-07-03). "Splatoon's art book is filled with concept art, comics and more". Polygon . Retrieved 2023-07-29. Although mainly cheerful, Callie can occasionally get tired of Marie's sassiness and make cruel comments herself, which she is very prone to while brainwashed. This is seen when she "got personal" during the result announcement of the Early Bird vs. Night Owl Splatfest and the Naughty vs. Nice Splatfest where she asked Marie why she was the one on Team Naughty, in which she ends up getting frightened and says she never meant anything by it.

Kohler, Chris. "I Want To Squeeze All These Splatoon Plushes Forever". Wired. ISSN 1059-1028 . Retrieved 2023-07-27. For her second outfit, which was shown in promotional art for the Japanese Grasshopper vs. Ant Splatfest, Marie wore a white yukata with a seashell pattern in lime green, navy blue, and dull purple. The calamari accessory had taken on a dark purple tint in addition to its existing colors.Callie and Marie's names are, when combined, wordplay on " calamari". Their names in different localizations of the game tend to be based on different puns.