The gear items given out by the Marina amiibo are replicas of Marina's Octo Expansion outfit, namely the Marinated Headphones, Marinated Top, and Marinated Slip-Ons.ДЄs an Octoling warrior, Marina's tentacles were shoulder-length and she wore the Octoling Goggles, Octoling Armor, and Octoling Boots with Elite Octoling seaweed on the sides of her head, first shown in Marina's chat room and again on the back of the Splatoon 2 Live in Makuhari -Tentalive- limited-edition slipcover.Дuring the Final Fest, she wore a metallic dress with a number eight cut at the chest and very long sleeves that turned into gloves, and matching boots that were higher than the hem of the dress. She wears a white bandana that is wrapped around her head with light gray designs, a long, silver chain necklace with an 8 symbol pendant (similar to her zippers from her stage outfit) around her neck, a black wristwatch and a black chain bracelet on her right arm, a white turtleneck crop top, seafoam colored capris, and silver bowed gray-white shoes. In the Octo Expansion, Marina wears a more hip-hop attire than her pop stage outfit, somewhat resembling rapper Tupac Shakur. During Splatfests, the teal on her design changes to match the color of the team she chose, except for her eyebrows. As seen in Splatfest artwork, she also occasionally wears glasses. She wears large black headphones with teal rings on the sides of them her ears, which are slightly bigger than those of the average Octoling, are usually covered by these headphones. She has black shorts with a diagonal waistline and slanted deep teal lines over teal tights, black fingerless gloves, and black boots with big undone silver zippers with 8-shaped holes like the one on her top. Her outfit consists of a sleeveless black top covering her chest with a large, mostly unzipped silver zipper with an infinity-shaped hole resembling an 8 and a high collar, leaving her midriff visible, showing a teal navel piercing. She has also stated that she has multiple hearts, like how real-life octopuses do. They are long (the longest of all Octolings) and worn down past her waist, and her fingers and toes are pointed and teal at the tips, giving somewhat the impression of painted nails. Her tentacles are a dark shade of purplish-brown with teal edges but can change completely to one color.

Like Pearl, and unlike other Octolings, her sharp teeth are in the center on both the top and bottom, instead of being asymmetrical. She appears to be taller than most Inklings and Octolings. She has dark brown skin, silvery-teal eyes with reddish-pink pupils in the shape of an infinity symbol (like octopuses in real life), two eyelashes on each eye, very dark teal eyebrows that are constantly downturned in a 'worried' expression, and a beauty mark at the left of her lips. Marina is an Octoling, the Octarian version of an Inkling.

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