Callie is a part of the Squid Sisters pop idol duo and a host of Inkopolis News, along with her cousin Marie. Her signature color is magenta.
Callie is a very fashionable Inkling, and has a more ‘edgy’ design in comparison to her cousin. Her tentacles, which are black with a purplish pink tinge at the ends, are very long and tied in a large bow on the back of her head, leaving the ends to dangle, along with a bang swept to the right of her face. She has large, angular eyes with gold irises and light brown pupils in the shape of a plus or a ‘ninja star’. Her eye markings end in small points, and her eyebrows are large and oval shaped. Her ears are slightly narrower, longer, and upturned than those of the average Inkling, and on them she wears a pair of chunky, milky white earrings. Her outfit, which appears to be a romper with a corset and purplish pink lacing in the back and puffy shorts, is black with a reflective texture, as if covered in sequins. On the front are three magenta marks, which, somewhat morbidly, are made to look like the cuts made in squid when it is cooked. With this outfit, she wears magenta tights, white gloves, and a small, white, pointed neck accessory giving the impression of a shirt collar. On her feet, Callie wears a pair of black wedge shoes with a texture similar to leather, which has a shiny purplish pink material on the bottom and two pink buttons on either side of the ankle. She wears a pink and white hat resembling the Japanese fast food Ikayaki on her head, and has a birthmark or a beauty mark on her left cheek.
During a Splatfest, any part of Callie’s appearance that is normally magenta will change to match the color of her Splatfest Team, including the ends of her tentacles.
As a child, Callie wore traditional Japanese-style clothing, and her tentacles were somewhat messy and much shorter, with the longest one falling just past her left ear. Her first outfit, shown in Sunken Scroll 17, consisted of a purple yukata with a squid pattern on the sleeves and a flower pattern towards the bottom, and a pair of thick black zōri with purple thongs. On the left side of her head, she wore some sort of purple accessory, resembling the feather part of her hat, and her bang is swept to the left like Marie instead of the right. For her second outfit, which was shown in promo art for the Japanese Grasshopper vs. Ant Splatfest, Callie wore a red orange yukata with a white jellyfish pattern and thinner zōri, but still with purple thongs. The purple accessory had changed to green and red, and she had what seems to be a blue inner tube strapped to her back.
While brainwashed by DJ Octavio, she wears a radically different outfit. She wears a small tank top in her colors that exposes her midriff, revealing an octopus shaped marking near her navel. Her earrings have been replaced by golden octopus earrings and her hat resembles an octopus tentacle. Her shorts appear to be made of black leather and are low cut enough to reveal a glimpse of pink fabric (possibly her undergarments), and her tights are dark purple with a magenta tinge and sequins, giving it a galaxy look. Additionally, she wears a pair of sunglasses revealed to be Octavio’s hypnoshades, which he uses to keep her under his influence.