This sand monster, known as the One-Tail, is one of the first tailed beasts we meet in anime, other than Naruto of course. Shukaku belongs to the Village of Hidden Sand and is sealed within the Fifth Kazekage, Gaarawhile he is still in the womb. Shukaku’s hatred of humans greatly affects Gaara’s childhood as he constantly breaks out of his seal and rampages through the village.
Due to Shukaku’s ability and threats to break free any time Gaara sleeps, the young jinchuuriki spends his formative years battling a severe case of insomnia. After Gaara befriended Naruto, he eventually learned to control his tailed beast more effectively and even improved their relationship.
Shuaku’s design is inspired by the Japanese. tanuki Youkai, a shapeshifting raccoon dog with a habit of playing pranks on people. Unlike the tanuki, Shukaku appears to be made of sand, but you can see elements of the tanuki in its dark ears, dark circles around the eyes, and bushy tail. For reference, another famous tanuki in the Japanese media is Tom Nook from the Animal Crossing video game series.
Shukaku’s personality is proud, short-tempered, and uncompromising, but he harbors an inferiority complex due to his position as the lowest ranked tailed beast. Despite its unique tail, Shukaku has superior defensive abilities compared to many other tailed beasts, such as the Ultimate Defense Technique that constantly protects Gaara.