The fiercely territorial Karasagei live in the mountain ranges of Ultra Forest. They drive off outsiders with powerful gusts of wind from their wings. Their habitats are difficult to study due to their protective behavior. Whole flocks will descend on a single researcher to chase them away with pecks, winds, claws, and crude weapons. The society built by Karasagei appears to be fairly advanced, and observation of Karasagei artifacts suggests that they have reached the early Iron Age. Karasagei are instantly recognizable by their oddly-shaped legs and feet, digitigrade in structure with toes growing from the ankle region and a thickly scaled, firm peg-like foot emerging from their palm.
Karasagei's calls are complex enough to form language. This language is difficult for humans to learn to understand, and impossible to replicate with human vocalization. A Karasagei's syrinx, by contrast, is very capable of mimicking human speech, similarly to Earthling corvids such as Murkrow and Corviknight. As a result, they are one of the few species of Pokémon that can be taught to speak and understand human languages. Some clans have become proficient in Japanese due to significant interactions with neighboring human settlements. Their intelligence is roughly equal to that of humans.
Karasagei are fond of music and have a strong sense of rhythm. Their drums are heard from the mountains shortly before rainstorms. Rain Dance was later confirmed in their moveset via training of captured individuals. They can learn a number of dancing moves, including Teeter Dance, Swords Dance, and Feather Dance. Though Rain Dance is not categorized with other dancing moves, researchers who have gained the trust of a village of Karasagei have witnessed their rain-summoning ceremonies, which are full of song and dance. They are also quite fond of their noise-related moves, attacking as groups using Round, Screech, Uproar, and Chatter.
Karasagei are difficult Pokémon to train. They require strong, clear communication skills in order to begin to trust their trainers, and they demand a level of respect in exchange for their obedience. Only a few individuals are maintained in captivity, and they must be granted occasional or frequent visits to their home world and villages in order to maintain cooperation. Researchers and the Karasagei themselves agree that the relationship is of a diplomatic nature. While contact with these ambassadors allows brief access to Karasagei villages and culture, they demand a high degree of respect for themselves and the land to maintain these relationships.