Evan Yoo (Yoo Yeonghun) is a student at Eunjang High School and is in Class 1-5.
Appearance
Evan had dark green hair with light green highlights. He had black eyes and a faint mustache. He looks older than his actual age, causing Helmet to think that he is a parent of one of the Eunjang's students rather than an actual student.
Personality
Evan was a typical bully much like Colton Choi. After Colton was defeated by Gray Yeon at the start of the semester, Evan still refused to accept Gray as the head of the class and considered him a fluke. He provoked Gray by drooling over his textbook, and Gray easily beat him up.
After his defeat, Evan kept a low profile in class much like Colton did. He, Manshik Yi, and Colton joked around together with him and Manshik laughing at Colton for thinking he could defeat Forrest Lee. He was shocked when Colton managed to remain standing while going up against Forrest and lasting until Ben Park arrived.
Plot
Episode 6
Evan approached Colton to team up to take down Gray in hopes of joining the Union. Colton agrees, but he remains doubtful that Evan could stand a chance against Gray. In the classroom, Evan aggravates Gray by drooling onto his textbook. Gray uses the textbook to smash in Evan's face and beats him up.
Episode 7
Gray beats Evan unconscious with his textbooks. Afterwards, he calmly returns to his seat and wipes the blood from his book. It was a shocking, yet powerful sight. Leaving the foes he crushed lying on the floor, then wiping their blood off his book. The scene burned one thing into the consciousness of every student in the classroom: Don't ever mess with Gray Yeon. Colton thinks there's no way he can turn the situation around and thinks Evan screwed up the situation even more.
News of Evan's defeat spread to the other classes. Ben tells Alex that if Colton and Evan were defeated, it's game over for Class Five. Later, as Gray walks through the hallway, the students talk about him beating Colton and Evan, and that Gray is the new head of Class Five. The remaining doubt, with the defeat of Evan, effectively turned into certainty. The two fights that had taken place in the classroom solidified Gray's place.
Relationships
Colton Choi
Evan initially tried to team with Colton to take down Gray after witnessing Colton's defeat, but Colton just stood back silently as Gray defeated them. They still seemed to be on friendly terms, though, because Evan hangs out with Colton.
Gray Yeon
At first, Evan thought Gray's win against Colton was a fluke. He tried to team up with Colton to attack Gray, but Gray quickly defeated Evan.