Ju-in for the most part is a friendly and outgoing person, who is always ready to lend a hand to his friends. he has incredibly high intellect (with an IQ of 200) and strong memory. he is willing to use his brain to hurt those who try to hurt his friends, even to the extremities. his happy persona is mostly for his dear friends otherwise he is only wearing a facade. you can call him a wolf in sheep’s clothing but no one is aware of this two sides of him. even you, only know of his sweet side.