Thylini
All seven Thuim lineages can produce children together. They are, technically, one species. The offspring of mixed lineages are called Thylini, and they carry the traits, physical and Ren-attuned, of every bloodline in their heritage.
Being Thylini is not a lineage in itself. It is a position: caught between cultures that all have opinions about your blood.
What Being Thylini Means
Section titled “What Being Thylini Means”A Thylini inherits polarities from every lineage in their heritage, in proportion to that heritage’s presence in their blood. A Janim-Nyl Thylini has both Elasticity and Influence to draw from. A Thylini with Daruner blood has Coalescence alongside whatever else they carry.
Physically, Thylini express traits from their full heritage, usually in combinations that mark them as mixed to anyone who knows what to look for. The same ashen Nyl complexion paired with the slightly taller Janim build. The golden metallic skin of a Haqol ancestor appearing as a tint. The Daruner’s geometric mark, dimmed but present.
The range of what Thylini can look like is enormous, and no two are quite alike.
The Highborn Exception
Section titled “The Highborn Exception”There is one form of mixed heritage that confers elevated social status rather than reduced: carrying Daruner blood in a recognized noble house. These individuals are called Highborn. The continent’s political and legal architecture is built on Daruner polarity, and Highborn status is the formal recognition that a family’s bloodline includes it.
Highborn Thylini are feared and respected in ways that most mixed-lineage individuals are not. Their Daruner mark, the geometric glow on the forehead, persists even when the rest of their appearance is drawn from other lineages, making their status legible.
For Thylini without Daruner heritage, no such structural exception exists.
How Different Cultures See Thylini
Section titled “How Different Cultures See Thylini”| Culture | Attitude |
|---|---|
| Anamor | Indifferent. What you are matters less than what you can do. |
| Elkyr | Welcoming of individual people from other lineages, but less enthusiastic about cultural integration as such. |
| Janim | Largely unbothered, unless you carry Nyl blood, which carries the weight of history. |
| Nyl | Looks down on all Thylini. Reserved particular harshness for Thylini with Nyl descent, who are seen as a dilution of something the Nyl regard as already superior. |
| Okoi | Thylini are rare but are treated as full family once accepted. The Okoi’s general distrust of outsiders makes initial acceptance difficult, but it is not conditional on lineage. |
| Highborn / Daruner | Highborn Thylini with Daruner blood are revered and sought. Thylini without it are discriminated against and typically lack house support. |
The Janim glance that lingered a beat too long on his ash-touched skin in disgust. The Nyl glare that looked down upon him as though he was filthy. Both saw him as flawed. Too compromised. Too much of the other.
Too much of neither.
— Shajomir of the Eventide Brigade, Janim/Nyl Thylini
The experience of being Thylini varies enormously based on which bloodlines are visible, which cultures you move through, and how those cultures relate to each other. A Janim-Elkyr Thylini in Kyr’elian faces a fundamentally different social reality than a Janim-Nyl Thylini in Lithywae.
There is no unified Thylini culture or political identity. What they share is the condition of being read through the lens of lineages that are not quite theirs.
The Theridim
Section titled “The Theridim”At the outermost edge of what a Thylini can be, there is a category that barely fits the term: the Theridim.
Where most Thylini carry two or three bloodlines, a Theridim carries all seven. Every Thuim lineage in one body: Anamor, Daruner, Elkyr, Haqol, Janim, Nyl, and Okoi, fully present and active. The physical result is what that implies: traits that belong to no single lineage, features that don’t map to any known people, a body shaped by the convergence of every Law of Ren simultaneously.
A Theridim possesses all seven lineage polarities. And beyond those, they manifest a polarity that no other being carries: Emergence, the eighth Law, entirely their own. What Emergence means in its full expression is not yet understood by anyone on the continent.
The Theridim are not a playable background. They are not numerous. They are not simple.
What they are, in the current moment, is a spark.
The Marathat ruins. The stirring of spirits. The tipping point the five nations are standing on. The idea that Theridim might soon appear and be loved by Ren in a way the other lineages are not is a cloud looming over those looking to keep all peoples separate.
There is a longer implication that fewer people have reached yet. A Theridim’s children carry all seven lineages. Their children’s children carry all seven. Because Daruner blood balances rather than dilutes, no lineage in that bloodline can fade. Every generation passes the full set forward. Given enough time and enough contact with the broader population, the endpoint of Theridim lineage spreading is a population where the distinction between lineages has ceased to mean anything at all. Every structure of power on the continent, noble houses, Highborn authority, the entire framework of lineage-based identity, was built on the premise that bloodlines stay separate. The Theridim are not a challenge to that premise. They are its conclusion.