What is the nickname given to the concave-convex figure by concave-convex black powder?

Greg's nickname is Rico, Kelly's nickname is Kay, Zitang's nickname is Magic, Lijie An's nickname is Lemon, and Gadro's nickname is Lord Gadro.

Concave-convex powder refers to the fans of concave-convex world.

Bump World is a domestic original 3D animation series produced by Qichuang Society. It has been broadcast for three seasons, and the fourth season started on April 29, 2022. Animation tells the story that people in the concave-convex world constantly exercise and use their abilities to break through customs in order to change their destiny and realize their wishes.