A Ranker (랭커, raengkeo) is a being who has reached the top of the Zahard Empire (currently 134th Floor) and has been given a Rank - e.g. Lero-Ro is most likely somewhere between 3000 and 1000. This Rank is not to be confused with the Ranking and Grading that both Rankers and Regulars continuously receive.
This Rank is issued by the Ranking Administration Office (랭킹 관리국, Raengking Gwahnligook; or "Ranking Affairs Bureau") and it is calculated after investigating and combining statistics such as a person's power, recognition and influence. There are some who hold high rankings due to the influence they hold (e.g. Baek Ryun) and there are others who have weak combat strength but hold high Rankings due to some other reasons like "serving the Royalty (e.g. Evan Edrok)".
As an example: Due to the Eurasia Enne incident, Eurasia Enne Zahard gained over 1000 Ranks and was listed as 7th in the rankings. Her gain in Rank, was in part due to her abilities and also infamy.
They may also use the Middle Area's staircases to either skip certain Floors or to travel between the Inner and Outer Towers. However, it is unknown if there are checkpoints along the Middle Area's staircases or if any other methods are used to restrict clearance mainly to Rankers. Though they are permitted many benefits (such as the right to freely travel amongst the Inner, Middle and Outer Towers), they are usually restricted from entering the Regulars' Districts.
It is important not to confuse the achievement of reaching the top of the Zahard Empire (which confers Ranker status) with reaching the top of the tower; no one has yet reached the top of the tower itself.
If a Ranker's ranking is in the top 1% of total Rankers, he/she can become a High Ranker (하이 랭커, hai raengkeo). There are about 1000 High Rankers in total. High Rankers are often described as gods among gods.
High Rankers earn the right to go up to the 135th Floor but the Guardian of this Floor is very hostile. So, it is unknown how many have succeeded in talking to it or even convinced the Guardian to allow someone not "chosen" by the Tower  to be tested by it. This is because only Irregulars can request to take a Guardian's test.
But for now, not a single High Ranker has been known to have ascended to the next Floor.
Sobriquet (이명, Eemyeong; "nickname" or "synonym") is a type of nickname issued by the Ranking Administration Office, usually in reference to the High Ranker's battle Position or other aspects. It shouldn't be confused with an ordinary nickname like "eyeball ghost". Only High Rankers like Garam Zahard, Eurasia Enne Zahard, Yu Han Sung get to receive a sobriquet. Rankers like Ren, Quant, Lero-Ro and Mule Love have none. Guardians don't have sobriquets.
Also, a person might be presented with more than 1 sobriquet as Koon Eduan is called Marlin and Blue Thunderclap. It's unknown if the limit is 2 sobriquets.
Fishermen are usually given the names of Shinheuh (specifically fish species). For example: Yuri Zahard's sobriquet is the Black Snakehead/Mullet. Guides are usually given the names of Boats. For example: Evan Edrok's sobriquet is the Fast Ship. Wave Controllers are usually given the names of winds and waves. For example: Po Bidau Gustang's sobriquet is the Lonely Wave.
A few examples of Sobriquets being named after something, other than a battle Position: Enryu's sobriquet is called "Red Tower" because whenever he passes by, the Shinsoo around him turns red for some unknown reason. Zahard is the first King in the Tower's history and his sobriquet is King of the Tower.
|Rankers In Order of Rank|
|2||Enryu(Inactive)||Red Tower||Spear Bearer||Irregular|
|3||Zahard(Inactive)||King of the Tower||Fisherman||King of the Tower|
|4||Urek Mazino(Active)||Ray Barracuda||Fisherman||Irregular and co-founder of Wolhaiksong|
|5||Arie Hon(Active)||White Sword; White Oar||Fisherman||Head of the Arie Family and 100th Floor Ruler|
|6||Koon Eduan(Active)||Marlin; Blue Thunderclap||Spear Bearer, Jeonsulsa||Head of the Koon Family|
|7||Adori Zahard(Active)||Killer Whale||Fisherman||Zahard Princess, Head of the Royal Guard and owner of the Golden November|
|7||Eurasia Enne Zahard(Sealed)||Great White Shark||Fisherman||Zahard Princess and owner of the Colourless December|
|9||Baek Ryun(Active)||None||Wave Controller||Co-founder of Wolhaiksong|
|10||Ha Yurin(Active)||Snake Head||Scout, Fisherman||Head of the Ha Family|
|11||Tu Perie Tperie(Active)||God's Eye||Light Bearer||Head of the Tu Perie Family|
|12||Molic One P. GR(Active)||Molic One||Unclassified||Eldest of the Three Lords|
|13||Eurasia Blossom(Active)||Flower Shrimp||Wave Controller||Head of the Eurasia Family|
|14||Po Bidau Gustang(Active)||Lonely Wave||Wave Controller||Head of the Bidau Family|
|15||Grace Mirchea Luslec(Active)||Heretic; Tiger Fish||Fisherman||Leader of FUG|
|16||Hendo Lok Bloodmadder(Active)||Long-Life Turtle||Defender||Head of the Hendo Family|
|17||Yeon Hana(Active)||Cichlid||Fisherman, Wave Controller||Head of the Yeon Family|
|36||Arie Hagipherione Zahard(Active)||Unknown||Unknown||Zahard's Princess and owner of the Red October|
|60~||Evankhell(Active)||Unknown||Unknown||2nd Floor Ruler|
|Top 100||Ha Jinsung(Active)||Unknown||Fisherman||FUG member|
|Top 100||Koon Maschenny Zahard(Active)||Unknown||Fisherman, Jeonsulsa||Zahard's Princess and owner of the Yellow May|
|100~||Evan Edrok(Active)||Fast Ship||Guide||Chief Guide of Zahard Family|
|500~||Ha Yuri Zahard(Active)||Black Snake Head||Fisherman||Zahard's Princess and owner of the Black March and Green April|
|500-1000||Yu Han Sung(Active)||Submerged Fish||Wave Controller, Dansulsa, Wonsulsa, Anima||2nd Floor Test Director|
|High Ranker||Ari Han(Active)||Unknown||Unknown||Head of the Ari Family|
|High Ranker||Augusgus(Active)||Unknown||Unknown||20th Floor Test Director|
|High Ranker||Garam Zahard(Unknown)||Mako Shark||Unknown||Zahard's Princess and owner of the Blue August and Indigo July|
|High Ranker||Heice Zahard(Active)||Unknown||Unknown||Zahard's Princess|
|High Ranker||Madoraco(Active)||Grey Catfish||Unknown||FUG member|
|High Ranker||Pondo Zahard(Active)||Unknown||Unknown||Zahard's Princess|
|Ranker||Alphid Zahard(Active)||None||Unknown||Zahard's Princess and owner of the Luminous June|
|Ranker||An Zahard(Active)||None||Unknown||Zahard's Princess and owner of the Silver January|
|Ranker||Baylord Yama(Active)||None||Unknown||FUG Slayer|
|Ranker||Hachuling(Active)||None||Scout||Wolhaiksong member and defector from Koon Family|
|Ranker||Hax(Active)||None||Fisherman||2nd Floor Test Admin|
|Ranker||Kurudan(Active)||None||Wave Controller, Dansulsa||Wolhaiksong member|
|Ranker||Lero-Ro(Active)||None||Light Bearer, Jeonsulsa||Former 2nd Floor Test Admin|
|Ranker||Lo Po Bia Ren(Active)||None||Wave Controller, Anima||Royal Enforcement Division member #67|
|Ranker||Mule Love(Active)||None||Spear Bearer||20th Floor Test Admin|
|Ranker||Ms. Ice Strawberry(Active)||None||Unknown||Wolhaiksong member|
|Ranker||Ms. Ice Strawberry's Partner(Active)||None||Unknown||Wolhaiksong member|
|Ranker||Noma(Active)||None||Unknown||21st Floor Test Admin|
|Ranker||Pedro(Active)||None||Unknown||Train conductor of the Hell Express, FUG member and loyal follower of Karaka|
|Ranker||Quant Blitz(Active)||None||Scout, Hwayeomsa||Former 2nd Floor Test Admin|
|Ranker||Unnamed Ranker(Active)||None||Unknown||FUG member|
|Ranker||Yu Bok-Dol(Active)||None||Spear Bearer||2nd Floor Test Admin|
|?||Robert Aisand(Active)||The Cold Wave||Unknown||Deputy Director of the Ranker Administration Office|
- ↑ http://www.batoto.net/forums/topic/4559-my-theory-on-tower-of-god/page__view__findpost__p__101700
- ↑ 2.0 2.1 Ch.76: 2F - Epilogue - Rachel (2)
- ↑ Ch.04: 1F - Headon's Floor (4)
- ↑ http://cafe.naver.com/inutero3334/62461
- ↑ http://cafe.naver.com/inutero3334/62461