Marco Diaz is the deuteragonist of the Disney animated series Star vs. the Forces of Evil, known as Star Butterfly's human best friend and eventual boyfriend, who helps her fight monsters and adjust to life on Earth. He is a responsible, karate-practicing teenager who evolves from a "safe kid" into a brave adventurer, becoming a Knight of Mewni and a key ally in her magical battles.
Rules are important: just add an all-male group of people and characters and only ONE female! Not 2, not 3, only one girl or woman! Reverse Smurfette Principle groups (where a group of girls had one boy) and double Smurfette Principle groups (where there are two girls in a group of boys) are fine!
