Ruby is a spindly anthropomorphic kraken that sports aquamarine skin, having dark blue shoulder-length tentacle hair protruding from the top of her head, the coloration transitioning into a cyan near the tips. She possesses vibrant turquoise eyes with white sclera and dark blue eyelashes, with her most distinctive physical attribute being her ears, which resemble pectoral fins.

Her typical wardrobe includes a green turtleneck sweater, purple high-waisted jean short shorts, purple, dark grey, and white striped leggings, grey knitted socks, and dark purple boots with purplish blue laces

When exposed to ocean water, Ruby transforms into a giant kraken. In this form, her skin changes to purple, having a slight sparkling texture present throughout most of her body. Her hair is also affected by the transformation, getting longer in length, suckers that now line the inner parts, and having small, glowing strips in-between each lock. Ruby’s ears are larger, a visible sparkling gradient prominent on the ends. Her eyes become a vibrant purple, with her eyelashes being a darker coloration. On her now webbed hands and feet, the suckers are always visible, albeit lacking a glow. On her torso, she has six fins that jut upwards, with three on each side, resembling a ribcage. Her upper arms and legs gain three spikes on each, with her lower limbs now having pelvic fins that protrude from the outer sides for stability. Ruby’s most distinguishing trait in this form, besides her size, is the extra leg, which has the same appearance as the other two. This extra appendage also aids in movement throughout the seven seas.

When Ruby’s bioluminescence is activated, her skin glows a bright pink, with the ends of her tentacle hair glowing purple. Her torso fins shine to the point of appearing almost white. As the bioluminescence goes down her arms and legs, it becomes more and more visible, even on her hands and feet. The suckers on them gleam a bright blue coloration, which contrasts with the darker shade of the suckers on her tentacle hair.

When her body armor is in use, her entire body is coated in a thin scaly-like substance, making her appear darker than normal. Despite the darker coloration, the sparkling trait from her skin remains, appearing a bright blue color all over the armor.