Cho "Maru" Seong Ju is a Terran player from South Korea, who is currently playing for Jin Air Green Wings. He is well known for being the youngest GSL player of all time, winning his first televised game at the age of 13.
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  to advance to the Ro32, where he lost 0-2 to San. 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 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.
Maru entered his first Code S tournament, 2012 GSL Season 2, in a group with GuMiho, Curious, and HerO. Despite low expectations, he defeated GuMiho and HerO to earn first in the group 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.. 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.
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
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. 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 TeamLiquid.net's list of the Best Games of 2013, as #27 and #6.
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.
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.
- Was described as a "Little teddy bear" by Lani during IGN ProLeague Season 4.
- Is the youngest Royal Roader in OSL history and the first eSF OSL champion.
- When Maru won his OSL title, he was one of two remaining players (alongside KangHo) from the 2010 GSL Open Season 1 still in Code S/Premier League.
|In Premier Tournaments|
|2015-02-01||2nd||IEM Season IX - Taipei||3 : 4||Life||$4,000|
|2014-06-18||3 - 4th||2014 Global StarCraft II League Season 2||2 : 4||Classic||$7,612|
|2013-12-06||3 - 4th||2013 Hot6ix Cup||1 : 3||Soulkey||$3,764|
|2013-11-09||3 - 4th||2013 WCS Global Finals||1 : 3||Jaedong||$17,500|
|2013-10-27||3 - 4th||2013 WCS Season 3||1 : 3||Dear||$10,000|
|2013-10-09||3 - 4th||2013 WCS Season 3 Korea GSL||1 : 3||Dear||$7,000|
|2013-08-10||1st||2013 WCS Season 2 Korea OSL||4 : 2||Rain||$20,000|
|In Major Tournaments|
|2013-09-27||3 - 4th||StarsWar League Season 3||2 : 3||HerO||$1,000|
|2013-02-07||1st||Asia Starcraft League||3 : 2||BboongBboong||$1,666|
|In Premier Team Leagues|
|2012-02-18||KSL Team League Season 1 Week 2||All Kill of StarTale|
|Complete Results in any Tournament|
|StarCraft II World Championship Series: South Korea Champion|
| 2012 Auction All-Kill OnGameNet Starleague
| 2013 WCS Season 2 Korea OSL
10 August 2013 - 19 October 2013
| 2013 WCS Season 1 Korea GSL
| 2013 WCS Season 3 Korea GSL|
- 2014-08-22 | 2014 GSL Season 3 Code S Ro32 Winners by inven eSports (trans. )
- 2014-06-14 | 2014 GSL Season 2 Code S Ro8 Day 1 and 2 Winners by inven eSports (trans. )
- 2014-05-31 | 2014 GSL Season 2 Code S Ro16 Groups A, B, C, D Winners by inven eSports (trans. )
- 2014-05-06 | 2014 GSL Season 2 Code S Ro32 Groups A, B, C, D, E, F, G, H Winners by inven eSports (trans. )
- 2014-03-06 | 2014 GSL Season 1 Code S Ro16 Groups A, B, C, D Winners by inven eSports (trans. )
- 2014-02-06 | 2014 GSL Season 1 Code S Ro32 Groups A, B, C, D, E, F, G, H Winners by inven eSports (trans. )
- 2014-01-17 | SPL MVP vs Jin Air Green Wings Winner by This Is Game at 2014 Proleague (trans. )
- 2013-12-05 | 2013 Hot6ix Cup Ro8 Matches Winners by This Is Game at Hot6ix Cup (trans. )
- 2013-11-05 | WCS KR Representatives, Pre-Blizzcon by This Is Game (trans. )
- 2013-10-05 | 2013 WCS Korea Season 3 Premier League Ro8 Day 2 Winners by This Is Game (trans. )
- 2013-09-29 | 2013 WCS Korea Season 3 Premier League Ro16 Group D Winners by This Is Game (trans. )
- 2013-08-13 | 2013 WCS Korea Season 2 Premier League Grand Finals Winner by This Is Game
- 2013-07-31 | 2013 WCS Korea Season 2 Premier League Ro4 Winners by This Is Game
- 2013-07-26 | 2013 WCS Korea Season 2 Premier League Ro8 Winners by This Is Game
- 2013-07-05 | 2013 WCS Korea Season 2 Premier League Ro16 Day 2 Winners by Fomos.kr
- 2013-06-21 | 2013 WCS Korea Season 2 Premier League Ro32 Groups C and D Winners by This Is Game
- 2013-05-29 | 2013 WCS Korea Season 2 Up/Downs Group A Winners by This Is Game
- 2013-03-05 | 2013 GSL Season 2 Up/Downs Group C Winners by This Is Game
- 2013-02-06 | 2013 GSL Season 1 Code A Ro48 Day 2 Winners by This Is Game
- 2013-02-01 | 2013 GSL Season 1 Code A Qualifiers Day 2 Winners by This Is Game
- 2012-10-17 | 2012 GSL Season 4 Code A Ro24 Day 2 Winners by This Is Game
- 2012-10-09 | 2012 GSL Season 4 Code A Ro32 Day 1 Winners by This Is Game
- 2012-09-25 | 2012 GSL Season 4 Code A Ro48 Day 2 Winners by This Is Game
- 2012-04-08 | IGN Proleague Season 4 Interview by LilSusie and LaniBot of IPL LiveU at IPL4 (trans. )
- 2012-03-27 | 2012 GSL Season 2 Code S Ro32 Winners by This Is Game
- ↑ sOs and Maru join Jin Air Green Wings
- ↑ GSL 2012 Season 1 Up/Down Match Day 3 Recap
- ↑ GSL 2010 Open Season 1 Round of 64 Days 1-4 Recap
- ↑ GSL 2012 Open Season 1 Round of 64 Days 1-4 Recap
- ↑ GSL 2010 Open Season 1 Round of 32 Recap
- ↑ GSL 2012 Season 1 Code A Week Three Preview
- ↑ GSL 2012 Season 1 Up/Down Match Day 3 Recap
- ↑ GSL 2012 Season 2 Code S Day 2 Preview
- ↑ GSL 2012 Season 2 Code S Day 2 Liquibet
- ↑ GSL 2012 Season 2 Code S Day 2 Recap
- ↑ GSL 2012 Season 2 Code A Round of 24 Day 2 Preview
- ↑ KSL 2012 Season 1 TLPD: Maru's record
- ↑ monk (2013-07-03). "SC2 Power Rank - July 2013". TeamLiquid.net. Retrieved 2014-07-09.
- ↑ "List 89". Aligulac.com. 2013-07-24. Retrieved 2014-07-09.
- ↑ lichter (2013-12-31). "The Best Games of 2013". TeamLiquid.net. Retrieved 2014-07-09.
- ↑ Interview with Lani (begins 1:29:30)