So Diego is kind of an FNF OC. By that mean he actually belongs to an alternate universe of various FNF characters that can be best described as a sort of "(Letter)-Sides" type of world.

In this FNF world, many people live in The United States of Newgrounds with famous states such as Nevada, Philly, Utah, and plenty others.

A large part of what makes society is music. Everyone loves music, and most people know how to rap. In this FNF world, people who hold music closest to their heart and rap, sing, or play music with passion can start to gain special abilities, such as enhancing their strength or speed.

Rarely, some that have a true dream in life and who will put their life on the line to achieve such dream might awaken their "arrow abilities", allowing them to summon colored arrows in the air through song. These arrows will grant special powers based on one's personality, soul, and dreams.

Yeah I know that's very JoJo but I have no excuses.