A tight knit band of merchants, hucksters and survivors, the Ostrons call Cetus their home. The town was built around an Orokin Tower, that both protects and nourishes them.
The Ostrons are the inhabitants of the Cetus settlement near the Plains of Eidolon on Earth. They are a hardy, mercantile people that dwell in the shadow of the Orokin Tower of the Unum, which they harvest for their livelihood. Kept safe from Grineer aggression by the arcane powers of the Unum herself, Cetus serves as their central trading hub in the Origin System and a refuge for all others who come to it with peaceful intentions.
As a Syndicate, the Ostrons have their own Standing that can be exchanged for various rewards from the town's NPCs. Ostron Standing can be gained by performing various tasks for the Cetus villagers, such as completing Bounties and donating various items to them including fish and gems. The Ostrons are a neutral Syndicate, and gaining Standing with them will not affect a player's Standing with any other Syndicate.
Konzu is an elderly Ostron who offers Bounties to players, limited-time multi-part missions out in the Plains that players can accomplish to earn Standing and other rewards. Talking to him will allow players to upgrade their standing title to the next rank. He also starts the Saya's Vigil quest after you have completed at least one bounty.
Hok is a blacksmith and vendor in Cetus whose trade centers around melee weapons. In particular, Hok's Anvil provides players with the ability to create Zaws, modular melee weapons that players can craft with different parts and stats as they desire. He also gilds Zaws and accepts them for standing.
His special daily offer consist of random premade Zaw sold for Platinum.
Players can also rename existing normal melee weapons in Hok's Anvil for a 15 fee, provided the weapon has reached rank 30.
Fisher Hai-Luk is an Ostron fishmonger who sells various fishing equipment, bait, and packs of special fish parts for a bit of platinum, which change daily. She also allows you to trade in your catches for standing or to carve them up for bait and resources.
Beastmaster Teasonai sells conservation equipment for capturing wildlife on the Plains of Eidolon. He also trades caged wildlife to be used as orbiter decorations and companion cosmetics for Plains resources instead of Standing. His daily offers will always consist of three items, and the resources needed to purchase his offers change daily.
The young and enterprising Nakak sells scavenged Grineer flares that temporarily increase Affinity Range, and carved Warframe masks used as Operator cosmetics. As with Master Teasonai, she accepts Plains resources instead of Standing and the resources needed to purchase her items change daily, although her inventory mostly stays the same. Besides that, she provides some miscellaneous information about Cetus and the Plains.
The grieving widow of the Ostron Archivist Onkko, this woman is involved in the Saya's Vigil quest. Originally located to the west of the central Cetus market, after the events of the quest she will be found next to Konzu.
If the player has completed both Saya's Vigil and The War Within, bringing their Operator to the north-east part of Cetus will allow them to access the Quills' hideout.
Post-The War Within Spoilers ▾▾
The representative of the enigmatic Quills is Onkko himself, under his full epithet Quill Onkko Primary. He provides the Operator with their first pre-built Amp, Mote Amp as well as offer modular components and arcanes for Amp. He also offer parts of Operator suits and their respective arcanes to further enhance the Operator. He trades in Sentient Cores and complete Amps for Quill standing.
The syndicate faction was originally named Cetus after their village in preview builds, before being changed on release to Ostron, the name of their people in Update 22.0.
Occasionally, a Corpus cargo ship will land on the docks or leave them, in the shadow of the Orokin tower. Pre-release streams showed the presence of Corpus Crewmen in the markets, abiding by a cease-fire, but their presence seems to have been removed as of release.
As of the release of Fortuna, there are now once again Corpus Crewmen hanging around Cetus, as well as some Solaris that have set up a stall.
The blade that Hok can be seen wielding cannot actually be crafted by the player, because it is missing a required link component.