Prototype Jinchuriki

Prototype Jinchūriki (プロトタイプ人柱 ; Literally meaning " Prototype Power of Human Sacrifice") are humans that have tailed beasts sealed within them. They exhibit extraordinary powers due to the immense chakra reserves they possess like the Original Jinchūriki.

Background
Lucy Heartfilia's adventure started when she had her fortuitous encounter with Natsu Dragneel and Happy, who invited her to join Fairy Tail. Along the way, she became friends with Gray Fullbuster and Erza Scarlet, as well as becoming a part of the strongest team in Fairy Tail. After taking and completing a vast amount of jobs, she and her team come across Wendy Marvel, a young Sky Dragon Slayer. As time progressed, Lucy and her comrades faced many hardships, but lived a content life nonetheless.