" Min-sung (Hangul:
정민성) is the assistant coach for Cloud9
. He was previously the mid laner for CJ Entus Frost
before his retirement on January 9, 2014.
He started gaming when PC gaming was getting popular in Korea but disliked Starcraft and preferred Fortress, a tank shooting game. After a while he found Warcraft and Chaos which he played for a long time. He found and started playing League of Legends because it was a "foreign" game. He started playing around the time Lux came out and started playing Blitzcrank. He didn't really like Blitzcrank that much and moved on to Annie. He saved up to later buy Anivia. 
- Attributes the strength of Frost to their closeness as players and friends; liking them to a second family.
- Believes that the lack of a hierarchy within the team is important as it allows every player to contribute to analysis and game planning.
- Favorite champions are: Anivia, Cassiopeia,  and Lux
- Koreans often said "Yeok-ppa-che" regarding his play, which roughly means "As expected, RapidStar is the best". It was said as mockery at first, but after he had shown great Lux and Anivia performances on Azubu The Champions Summer 2012 Final against CLG EU; it became a true expression of respect.
- The name RapidStar is represented in the Korean characters, Min(fast, swift), and Seong(Star).
- Popularizes Lux in competitive League of Legends.
- Bravely chooses Anivia to against the best Anivia player Froggen.
- Awarded Best Mid Laner at 2012 Korean e-Sports Awards. 
- Retired from active play January 9, 2014.
- This table shows up to the 10 most recent results. For complete results, click here.
|RapidStar Tournament Results|
|2018-09-16||1|| NA Regional Finals 2018||3 : 0 TSM|| C9|
|2018-09-09||2|| NA LCS 2018 Summer Playoffs||0 : 3 TL|| C9|
|2018-08-20||2|| NA LCS 2018 Summer||11 - 7 RR|| C9|
|2018-03-18||8|| NA LCS 2018 Spring||6 - 12 RR|| FLY|
|2016-10-29||5 - 8|| World Championship 2016||1 : 3 ROX|| EDG|
|2013-08-31||4|| Champions 2013 Summer||2 : 3 MVP O|| CJ Frost|
Ganked By Mom,
|2013-06-15||4|| Champions 2013 Spring||0 : 3 SKT T1 2|| CJ Frost|
|2013-03-09||2|| IEM Season 7 World Championship||1 : 3 CJ Blaze|| CJ Frost|
|2013-02-23||4|| OGN Club Masters||0 : 3 KT|| CJ|
|2013-02-02||2|| Champions 2013 Winter||0 : 3 NJ SWD|| AZF|
As a Coach
As a Player
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