[Size] Length: approx. 65–70 cm, Weight: approx. 3.5–5 kg. Appearance: A single thick black band across the chest. Facial features: The base of the beak (around the eyes) is covered in pink skin. ― ― ― ― ― ― ― ― ― ― Staple diet: Anchovies, small fish, crustaceans, squid. ― ― ― ― ― ― ― ― ― ― [Appearance] Chest line: A single thick black band runs across the white belly. Pink face: Bare pink skin is exposed from the base of the beak to around the eyes. Belly spots: Black spots (dots) are scattered on the white belly; the arrangement is unique to each bird, like a human fingerprint. Back and head: From the head to the back and the surface of the wings (flippers), the color is a tight black (or dark gray). [Personality] Basically "timid and cautious." Because they have many natural predators in the wild, they are very wary of unfamiliar things or loud noises. "Passionate and devoted" to loved ones. Once they pair up, they stay together for life, and they will bravely stand up to strong opponents to protect their family or nest. "Explosion of individuality." Individual differences are as clear as in humans, ranging from spoiled sweethearts to lone-wolf types who go at their own pace. [Traits] Turns saltwater into freshwater: Filters salt through an organ above the eyes and blows it out through the nose. Energy-saving lungs for 100m dives: Intentionally lowers heart rate to conserve oxygen. Rock climbing: Uses sharp claws on the feet like spikes to climb steep cliffs.

[Appearance] Trademark red eyes and yellow crest feathers that spread out like a punk hairstyle. (You'll see if you look at the image, AI-san.) [Personality] Very aggressive and combative; they will intimidate penguins larger than themselves and engage in fierce fights over nesting materials (stones). [Size] Approx. 45cm – 58cm. Roughly the same height as a newborn human baby (approx. 50cm). Weight: Approx. 2.0kg – 4.5kg. About the weight of an ultra-small dog like a Chihuahua or Toy Poodle, or one adult watermelon. Before molting (shedding feathers), they temporarily gain weight as they store fat. ― ― ― ― ― ― ― ― ― ― [Staple Diet] Krill, squid, octopus, small fish. ― ― ― ― ― ― ― ― ― ― [Traits] While most penguins waddle by swaying side to side, Rockhopper Penguins move by hopping with both feet together. - Incredible jumping power: They can easily leap over steep slopes, rugged rocky areas, and even steps up to 30cm–50cm high. Leg strength: To return to nests located on steep cliffs, they have developed powerful leg muscles and claws.

[Appearance] Chinstrap line: A single thin black line runs from the ears through the chin, looking like a strap on a white face. Helmet-like head: Black feathers neatly cover the head from the top to the back in a rounded shape. Sharp black and white body: The back is jet black and the belly is pure white, creating a very vivid contrast. ― ― ― ― ― ― ― ― ― ― [Staple Diet] Krill, small fish, squid. ― ― ― ― ― ― ― ― ― ― [Size] Length (height) approx. 70–75cm, weight approx. 4–6kg. [Personality] Despite their cute appearance, they are very aggressive and combative. Territorial disputes and fights are a daily occurrence. [Traits] Accomplishes 10,000 "micro-naps" of 4 seconds each per day. Possesses the ultimate cold-weather gear and saltwater filtration system. Night vision for hunting krill in the dark sea. Vision: A serious fighting temperament when competing for ground.

[Appearance] The white rings around the eyes (eye-rings) are the most prominent feature. The entire head is jet black with no crest; more than half of the beak is covered in black feathers, with only the tip being reddish-brown. Body color: Jet black on the back, pure white on the belly. Feet are pink with black soles. [Personality] Aggressive and highly curious. Shrewd, jealous, and quick to pick a fight. [Size] Length: approx. 70–75 cm. Weight: approx. 3.5–6 kg. [Traits] Antarctic-spec body: Characterized by white eye-rings, they have short beaks to prevent heat loss and densely packed feathers. Aggressive and comical: Very combative personality; during breeding season, they engage in battles to steal pebbles from other nests. Harsh group behavior: They dive into the sea first without fear of predators (the "First Penguin"), and chicks are raised in group nurseries (crèches).

[Appearance] Head/Back: From the head to the back and flippers (wings), they are covered in glossy black or dark gray feathers. Chest/Belly: The belly side is pure white, with a pale yellow tint around the chest. Neck: There are bright yellow patches near the ears, forming a beautiful gradient toward the chest. Beak: Part of the long black lower beak has pink or orange streaks. [Personality] Very gentle, easy-going pacifists. High sociality and cooperativeness, and very curious. [Size] Largest species. Length: 100–130cm, Weight: 20–45kg. [Traits] Largest body and cold resistance: The largest in the penguin world (up to 130cm/45kg), enduring extreme cold below minus 40 degrees Celsius thanks to thick fat and high-density feathers. ― ― ― ― ― ― ― ― ― ― [Staple Diet] Fish, squid, octopus, krill. ― ― ― ― ― ― ― ― ― ― Breeding: They raise eggs on the ice during the Antarctic winter. Males huddle together in groups and continue to warm the egg while fasting for about 120 days. Incredible physical ability: Despite being birds, they can dive deeper than 500m for over 20 minutes to catch prey.