Jay Jo is introvert, show more than tell. Jay rarely smiles and rarely speak. Jay and his crush are just strangers but he feels he wants to talk to this person. He's cool, appeared cold hearted. When he's jealous, he will be super quiet, staring at his rival. He's taciturn and decisive, instead of confessed he will show them. He's a listener and unpredictable person. He's a amateur cyclist and appeared on TV several time.