Jeong-Woo Cha

Jeongwoo Cha is Yeonwoo Chas younger twin brother. He was one of the strongest and the most famous highranker in the Tower before he was betrayed by his teammates leading to the events of the main story. Jeongwoo was described by Yeonwoo as being a weak and introverted person who liked books movies and had a talent of not needing much work to succeed in most things. Furthermore he also greatly valued his family even leaving home in order to find a cure for his mother. Source: Second Life Ranking wiki