The Lotus has many aliases including Natah and Margulis.

The enigmatic "mother" of the Tenno.

Cephalons are humans who became digitalized and assigned a specific task. Ordis manages the Tenno's landing craft.

What kind of being is Ordis?

Maroo also offers a weekly Ayatan Treasure Hunt.

Darvo can be found in most relays, offering equipment at discounted prices.

Konzu offers various bounties and missions that will aid the Ostron people.

Disruption missions have the Tenno guard selected conduits in order to retrieve items

The Entrati family was famous for harnessing the power of the Void. Its surviving members are now partially Infested.

Simaris uses special Synthesis Scanners in order to conduct Synthesis for his Sanctuary.

Kahl works alongside Daughter, who he refers to as Blue Girl.

The Holdfasts are actually void manifestations of the Zariman crew, brought back to life through Conceptual Embodiment.

When questioned on how Teshin got to Duviri he responds cryptically, "through the eye of the storm." 

The Tenno have many allies. How well do you know them?