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[e][h]Terran Maru
Player Information
Romanized Name:
Cho Seong Ju
July 28, 1997 (1997-07-28) (age 18)
Alternate IDs:
Marine Prince, EXID Terran
WCS Korea rank:
Links Profile
2013 WCS Season 2 Korea OSL2015 StarCraft II StarLeague Season 1
2010-10-13 - 2013-12-13
2013-12-13 - Present

Cho "Maru" Seong Ju is a Terran player from South Korea, who is currently playing for Jin Air Green Wings.[1] He is well known for being the youngest[2] GSL player of all time, winning his first televised game at the age of 13.[3]

Wings of Liberty

Maru made his professional debut in the very first GSL, the 2010 TG Sambo Intel Starcraft II Open Season 1. There, he defeated fan favorite Cella 2-1 [4] to advance to the Ro32, where he lost 0-2 to San.[5] The series against San would be Maru's last games in the GSL for almost a year; he did not qualify for Code A until GSL August, where he fell 0-2 to Fruitdealer in the Round of 32. Maru's attempts to qualify for GSL October and GSL November also failed, though the single game he took off of Curious during the October preliminaries was Curious's only loss that season.

2012 proved a much better year for Maru. He started out the year strong, qualifying for Code A in the 2012 GSL Season 1 preliminaries and defeating Noblesse and Yeah in the process. His first match in the Ro48 was a 2-0 win against favored[6] opponent MorroW. Then, in the Ro32, he managed to beat Happy 2-1 before dropping to NaDa 2-0 in the Ro24. The loss sent him to the Up and Down matches, where he showed that he had the skill of a Code S player by defeating sC, Terius, Alicia, and JYP to earn a Code S spot.[7]

Maru entered his first Code S tournament, 2012 GSL Season 2, in a group with GuMiho, Curious, and HerO. Despite low expectations,[8][9] he defeated GuMiho and HerO to earn first in the group[10] and move on to the Ro16. There, he defeated MC 2-1, but then lost to Squirtle 0-2 and Oz 1-2 to finish third in his group. He now faces Creator in the Ro24 of Code A.[11] Maru lost 0-2 and fell into Up and Downs, finishing second in his group with only one loss to Curious and securing his Season 3 Code S spot. There he ultimately lost in Ro32, after losing to DongRaeGu and viOlet, and despite beating Oz. In Ro32 of Code A, he lost to Polt, falling into Up and Downs again. He was able to beat only aLive there and after losing to HerO, SuHoSin and Shine, he fell to Code A.

In GSL Season 4 Code A, he beat EffOrt, asd and JYP to come back into Code S for Season 5. However, Code S was not pleasant to Maru, and he was swept in his Ro32 group by Curious and Soulkey and fell into Code A again, where he lost 1-2 to Losira in the Ro48 and got eliminated out of GSL.

In the last Wings of Liberty GSL, Maru qualified through the Preliminaries to Code A, where he was able to beat Dream, but lost to Sniper in Ro32. He was able to win his group in Up and Down though and participated in the first WCS GSL.

In addition to his GSL success, Maru has also done remarkably well in the 2012 KSL team league Season 1, where he currently has a 12-3 record,[12] including a 6-kill all-kill of team StarTale.

Outside Korea

Maru has played in one offline foreign tournament so far: the IPL 4 on April 6, 2012. IGN awarded him a spot in the Open Bracket because his team, Prime, was playing in the GSTL finals, which were also hosted at IPL 4. Maru's performance was not especially strong, however; he only defeated CatZ and Illusion before falling 0-2 to TaeJa and 1-2 to Virus.

Maru competed in the online Asia Starcraft League from August 7, 2012, to February 7, 2013. He easily reached the bracket stage, going 4-1 in each of the group stages. In the winner's bracket, he defeated notable Chinese players F91 and MacSed 2-0 each in the second and third rounds of the bracket stage and defeated the Taiwanese player Sen 3-1 in the fourth round. He faced fellow Korean BboongBboong twice, in the semi-finals and the grand finals, defeating him 3-2 both times to win the tournament.

Heart of the Swarm

After entering the WCS Korea Season 1 GSL, Maru, despite beating BBoongBBoong, lost to both Soulkey and Flash and fell into Code A again.

Rise to Championship

Maru was able to qualify for WCS Korea 2013 Season 2 Premier League, hosted by OGN, through the Up and Down matches by losing to Leenock and winning against Ruin, Bunny and DongRaeGu. He defeated sOs twice in the round of 32, and Trap and SuperNova 2-1 each in the round of 16 to reach the bracket stage of the tournament. After handily defeating perennial Code S/Premier League player Symbol, he was matched against the WCS Season 1 Finals champion INnoVation. According to the TeamLiquid Power Rank and Aligulac rating website, INnoVation was rated the best player in the world at the time, and was the heavy favorite in the matchup.[13][14] However, by using highly varying, cheesy, and aggressive builds, Maru was able to take the first three games without difficulty, and took advantage of a shaken up INnoVation to close the series 4-0 in a fairly standard game. This brought him to the first finals of his career against Rain, where after dropping the initial two games, Maru took the third game with a proxy 11/11 which gave him the momentum to end up winning the championship 4-2.

"Marine Prince" near the top

After winning the last OSL, Maru flew to Cologne, to participate in WCS Season 2 Finals at GamesCom. He was placed in a group with Team Acer duo in Scarlett and MMA and Evil Geniuses' aLive. After unexpectedly losing to aLive, Maru beat fellow Terran player MMA. But the next day, he fell after a failed proxy to Scarlett, finishing the tournament at 9th-12th place, getting 750 WCS points and $5,000.

Soon after it, Maru entered Season 3 WCS GSL as a relative favourite, still not being considered as a top contender, especially after a tough loss at Season Finals. He took first place of his Ro32 group after beating Sleep and Bbyong, moving into Ro16. There, he met Flash, PartinG and KangHo. An initial loss to PartinG did not throw him off and after winning against KangHo and Flash, "Marine Prince" moved into his second playoff bracket in a row, and his first ever GSL top 8.

In the top 8, he met the former GSL champion jjakji and beat him 3-1, but soon after, Maru lost 1-3 to the future Royal Roader Dear, finishing this season at 3rd-4th place, securing a place at WCS Season 3 Finals and a seed for the next season of GSL.

When Season 3 Finals started, Maru was considered as one of main favourites this time. After beating soO and duckdeok, Maru moved into the playoff bracket where he met MMA once again, this time with the latter being WCS Europe champion. Despite dropping the first map, Maru prevailed 3-1 and moved into the top 4 where he met Dear again. Maru lost 1-3 again, and finished with another semifinal appearance. Two games of this series are featured in's list of the Best Games of 2013, as #27 and #6.[15]

However, Maru accumulated enough points to enter the final stage of the season - WCS Global Finals in Anaheim. Being 7th seed, he dropped MC 3-1 in first round with relative ease, and moved on to play another Protoss player, duckdeok, who just eliminated INnoVation. In a long-fighting series, Maru prevailed 3-2 and moved into his third consecutive top 4, where he met another fan favourite, Jaedong. In an exciting series, causing huge cheers from the crowd, Maru ultimately lost 1-3 and fell in another semifinal.

Because of his OSL championship, Maru was invited to play in the Hot6ix Cup. He met soO in first round, eliminating SK Telecom T1's player from tournament with 3-0 score. Then, he faced Soulkey, the "Iron Wall" Zerg player, who outplayed Maru, and sent the "Marine Prince" to prepare for the following season with a 3-1 score, eliminating him in his fourth semifinal in a row.

On 13 December 2013, Maru left Prime and moved into Jin Air Green Wings with sOs.

Maru entered new season of Code S being one of three remaining Terran players, after jjakji moved to WCS Europe. In the Ro32, he lost his initial match against Classic, but after a series of comebacks, he won against Zerg players Symbol and Hydra to move into the Ro16.

After groups were announced, many thought that Maru was done.[who?] Maru had his two main nemeses, Soulkey and Dear, and KT Rolster's ace Zest in his group. Despite losing the then-fastest game in GSL history to Zest after a scouted proxy rax on Daedalus Point, Maru was able to beat Dear this time in winners match, therefore avoiding Soulkey and moving into the Ro8 as first place. However, there he met Startale's Life and lost 2-3, stopping his series of semifinals appearances but securing his seed for next GSL anyway.

In the next GSL Code S, Maru was one of the four Terran players. He swept his Ro32 group, 4-0'ing MyuNgSiK and DongRaeGu. After losing a macro game to SK Telecom T1's Zerg Dark, Maru cheesed his way into the Ro8 after destroying Zerg's defences and abusing Stork for not scouting properly, securing his sixth playoffs appearance in a row.

In the quarterfinals, the young Terran met Soulkey, who was at 13-3 winning record against Maru. However, Maru prevailed 3-1 and moved into the semifinals. There, he met Classic and lost 2-4 in a back-and-forth series, to finish in another semifinal and watch Classic ultimately winning the championship.

Being already qualified for Season 3, Maru got placed into the same group as Reality, Trap and Hush, where he took first place taking down the two Protoss players. Now in the Ro16, he was placed to be in a group with INnoVation, PartinG and Stats, losing to both PartinG and Stats, and taking last place in his group and getting eliminated from the GSL Season 3 Code S.


One of the Best Terran Players in the World

In December 2014, Maru qualified for the newly introduced StarCraft II StarLeague, defeating DeParture, Check and Solar and thus qualifying for the Challenge Series. Only a few days later, he attended the GSL Season 1 Qualifier, where he got byes for the first two rounds, before dropping to the lower bracket due to a loss to TY. In the bottom bracket however, he defeated both Impact and Shine (Lee Young Han) 2 to nothing to eventually move into GSL Code S. He was then seeded to play the international seed Jim in the SSL Challenge series, whom he beat 3-1 in a rather quick series, to move through to the Main Event. In the GSL Code S Round of 32, he was put into a group with PartinG, First and Hack. While being able to beat Hack 2-1, he then lost to PartinG 0-2, to face First in the deciders match, who he ended up beating 2-0 moving through to the Round of 16. Only a week after, he was playing at the IEM Taipei to which he qualified, by beating Sorry, Rogue, Dream and DeParture. Being one of the strongest players at the time, he was regarded as one of the favorites to win the entire tournament, with only Life given top priority, due to recent results. In the group stage, Maru was once again seeded into the same group as PartinG, as well as Hydra and TRUE. He beat the two Zergs 2-0 each, but once again lost his series against PartinG, advancing to the Ro8 in second place. There, he met herO, whom he beat convincingly 3-1, and moved through to face Soulkey next, whom he beat 3-1 as well. From there on, he went to the final, now facing Life. He started the series off by losing a single game, before winning the next three. However he was not able to close the series out, as Life took one map after another and in the end took the series, leaving Maru finishing as the second place.

Back in Korea, Maru was going to play his SSL Round of 16 group after that, where he was facing the group of Death in Dream, Dark and TY. Although losing to Dream in his first series of the day, he managed to come back from the losers match, beating both TY and Dark 2-0 to move through in second place. In his Round of 8 match, he was facing Leenock. He dominated the series 3-0 going to the Round of 4, where he was going to meet Stats. Before that however, he was supposed to play his GSL Round of 16 group, where he was once again matched in the same group as PartinG, as well as herO and MC. Although managing to defeat Parting 2-1 in their first series of the day, he then lost to herO in the Winner's match, once again putting him against PartinG in the decider, to whom he once again lost 0-2, kicking him out of Season 1 Code S and placing him into Season 2 Code A. Shortly after he faced Stats in the SSL Semifinals, beating him 4-2, as he moved on to the grand finals.

Due to his second place at the Intel Extreme Masters Taipei, Maru was qualified for the Intel Extreme Masters World Championship in Katowice. There, he met Patience in the first round. He absolutely dominated the Protoss, leaving no chance and beating him 3-0, to advance to the Round of 8, where he then met Dark and lost to him 0-3. With a disappointing run in Katowice, Maru had to go back to Korea to play out the SSL finals a week later, in which he beat Dream 4-1, claiming his second Premier League title, as well as being the first ever StarCraft II StarLeague Champion.

Being automatically qualified for the Starcraft 2 Starleague Season 2 due to being placed in the top 4 of the last season, Maru only had to go through GSL Code A this season, where he met Billowy whom he beat in rather dominant fashion 3-0, once again qualifying for Code S. Being already qualified for SSL, Maru was placed into a group with Zest, Hurricane and Leenock, where he beat Zest and Hurricane convincingly in his at the time strongest match-up TvP, only dropping a single map to Hurricane, once again moving through to the Round of 8.

Only shortly later, Maru was able to lead his team, the Jin Air Green Wings to victory against KT Rolster in the 2015 Proleague 2nd Round Semifinals, taking out Zest once again as well as Life and Stats. While he was fielded in the finals against CJ Entus, just as the series was tied 3-3, he was crushed by ByuL, ending the series with a 3-4 defeat and a second place for his team.

A few days after, Maru was once again matched against ByuL, this time in a Best of 5 series during the KeSPA Cup Season 1 RO16. The series was much closer than his defeat in Proleague, but still ended with a 2-3 defeat for the Jin Air Terran, signaling the early end of his run at this tournament. Shortly after, his GSL group was played out, where he one more time met ByuL in his first match. Once again the series was close, but this time Maru won 2-1, and moved on to the winners match against KT Rolster's TY. He beat him 2-1 in another close TvT series, and moved on to the Round of 16.



In Premier Tournaments
Date Place Event Team Result Winnings
2015-09-25 GOMTV Global StarCraft II League A33 - 4th 2015 Global StarCraft II League Season 3 Jin Air Green Wings 1 : 4 Terran INnoVation $3,610
2015-03-21 StarCraft II StarLeague A11st 2015 StarCraft II StarLeague Season 1 Jin Air Green Wings 4 : 1 Terran Dream $36,068
2015-02-01 Intel Extreme Masters A22nd IEM Season IX - Taipei Jin Air Green Wings 3 : 4 Zerg Life $4,000
2014-06-18 GOMTV Global StarCraft II League A33 - 4th 2014 Global StarCraft II League Season 2 Jin Air Green Wings 2 : 4 Protoss Classic $7,612
2013-12-06 GOMTV Global StarCraft II League A33 - 4th 2013 Hot6ix Cup Prime 1 : 3 Zerg Soulkey $3,764
2013-11-09 World Championship Series A33 - 4th 2013 WCS Global Finals Prime 1 : 3 Zerg Jaedong $17,500
2013-10-27 World Championship Series A33 - 4th 2013 WCS Season 3 Prime 1 : 3 Protoss Dear $10,000
2013-10-09 World Championship Series A33 - 4th 2013 WCS Season 3 Korea GSL Prime 1 : 3 Protoss Dear $7,000
2013-08-10 World Championship Series A11st 2013 WCS Season 2 Korea OSL Prime 4 : 2 Protoss Rain $20,000
In Major Tournaments
Date Place Event Team Result Winnings
2013-09-27 A33 - 4th StarsWar League Season 3 Prime 2 : 3 Protoss HerO $1,000
2013-02-07 A11st Asia Starcraft League Prime 3 : 2 Zerg BboongBboong $1,666
In Minor Tournaments
Date Place Event Team Result Winnings
2014-10-21 A11st Leifeng Cup Monthly #1 Jin Air Green Wings 2 : 1 Zerg Solar $1,000
In Premier Team Leagues
Date Event Result
Complete Results in any Tournament


StarCraft II StarLeague StarCraft II StarLeague Champion

Preceded By:
2015 SSL Season 1
21 March 2015 - 20 June 2015
South Korea Terran Maru
2015 SSL Season 2
Succeeded By:
South Korea Protoss Classic








External links