He had a large, black, triangle-shaped pompadour. He had gray eyes and a menacing face. He uses a shinai as a weapon.
Triangle had the delinquents' persona. If the player got too close to him, he would shove them away. If Yandere-chan were to attack him, he would attack her and put her in a coma. If she had a weapon out, he would assume a menacing stance, ready to fight.
He spawned by the left side of the disposal area at 7:15 AM. He disappeared at 8:30 AM and returned at 1:15 PM. He disappeared again at 1:30 PM, this time for the rest of the day.
- He was implemented in the March 2nd, 2016 Build.
- He was removed in the April 26th, 2018 Build.
- In 1980's mode, he will be the leader of all the male delinquents.