Jin Kougasaki is an Oni and student of Rasetsu Academy.

Jin is a boy with light-colored hair and slanted eyes. He wears the standard Rasetsu Academy uniform along with a face mask that assists in concealing the many scars that line the majority of his body, including the lower half of his jaw.

These scars were afflicted upon Jin during his childhood by his father, Momoido Hayate and have since then been stitched.

Jin is a calm and rational person who is quick to analyze the situation. However, he is also easily angered by hindrances in his path and can be incredibly uncooperative as shown during the first assignment. Despite his bad temper and icy demeanor, Jin is capable of kindness and gratitude. Also, due to the pain of losing his mother and older sister, Jin is quite sentimental when it comes to such things.