Jeon Jang-Il
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He was a Sun-Woo Clan elder who became Shi-Woon Yi's teacher after Chun-Woo Han. Although his goal was originally to stop the fight between Shi-Woon and Ji-Gun Yoo by exhausting him through an extreme training regime, he later warmed up to Shi-Woon after he reminded him of the previous clan head with his determination. (Source: The Breaker Wiki)
