The Otii, also called dark elves, moon elves, or drow, are the oldest and most long lived of the elf lineages. They are largely an insular people, opting to spend their lives in their homeland of Otii'niah, which is widely believed to be the source land of all magic. Being so close to said source, the Otii are the most magically inclined of all elves. They live with magic woven into every single aspect of their lives, from the mundane to the miraculous.
These dark elves are called so due to most of them being some dark shade of color ranging in hues of violet to blue. Some are paler, even to the point of matching a noon time sky, but the majority can easily blend into the night. While there are non Otii elves with very dark skin, it's likely that Otii are given the title also due to the fact that they live in a land of eternal night, cause by a magical atmosphere that blocks out the majority of sunlight, as well as the massive treetop canopies that cover the entire land. The Otii are built for life in darkness.
Aside from their dark purple-black skin, most Otii are also either born with or develop dark markings on their face, usually near the eyes. No two Otii have perfectly matching markings, though blood relations might have similar shapes or placements. They can live upwards of 2,000 years, though they also have a magical means of peacefully ending their current cycle by giving their spirit back to The Source, a ritual usually used only with the elderly, sick, and disabled (usually in such a way that is terminal). The Otii have zero qualms with death as a natural part of the cycle of life.
Among them, there are those they call Osu, who are born with black sclera and are destined to be spiritual leaders as they are believed to be touched by the night. Osu are uncommon, with only a small handful born in a generation, and fewer still who actually take up the role. They are not forced into the role, though they are often nudged in that direction. It's important to the people that Osu are well educated about the world, and so they are encouraged to leave the homeland for a time to get a feel for the rest of the world. Whether they come back home or not is fully up to the individual, and while it can be disappointing, most wouldn't be surprised or angry over the choice to become a part of the larger world. Besides, they have plenty of time and are always welcome back home.
Those Who Deny the Dawn
Composed by Yasunori Nishiki
[Mod Aerith note: I do not care if this isn't FF music, I need you to understand how PEAK Yasunori Nishiki is for composing peak final boss themes and as one of the major composers + arrangers on the ff7 rebirth soundtrack for big tracks, you need to listen to peak. play octopath 2, please.]
An Archive of Our Own, a project of the Organization for Transformative Works
MAJOR SPOILERS FOR ALL OF CASTTI'S STORY (CHAPTER 4).
When asked how the king can repay Castti for saving Timberain she requests four tombstones with the names of her Eir's Apothecaries to be made and erected in Healeaks. There at Healeaks she will deliver a eulogy and the long delayed and deserved funeral for the Eir's Apothecaries: Emma, Andy, Randy, and Malaya. Finally she can grieve.
(I was gonna make this into a Villain Talk, but if I do, it won't be for a while so I'll kinda summarize my points here)
So, if you've played OTII, you know that Ori and Oboro are the two most sympathetic members of the Moonshade Order. By contrast, Trousseau is a maniac, Tanzy is unhealthily obsessed with Arcanette, Petrichor... we don't know much but she was taken in by Archanette as a child so we know that whatever that was can't be good and Arcanette, Harvey and Claude are all pretty clearly evil.
And while I won't say that it's good writing, I believe to some extent that it was intentional. Oboro and Ori contrast with the rest of the Moonshade Order in several ways.
Ori and Oboro (or rather, Kazan) are the two members of the Order to have a significant presence in their respective stories as allies to the Travelers. Everyone else is either an antagonist from the word "go" (so to speak, in the case of Trousseau) or only plays a minor role until their reveal.
Ori and Oboro have low views of humanity due to their traumatic upbringing: It's implied that Ori has seen so much suffering that she's basically stoic when Ku comes a'knockin' a second time and Oboro is so jaded that the Book of Night has no effect on him because it's just more or less confirming what he already thought. By contrast, two members of the Order were ordinary people driven to madness while the rest of the Order... are themselves the type of people that more or less reaffirm Oboro and Ori's views on humanity. Arcanette seems to be the only one of the three selfish/sadistic members Ori doesn't hate, but considering Arcanette's wheelhouse is manipulation, I guess that's fitting.
By the time Vidania rises, Ori and Oboro are the last two members of the Order standing, albeit by chance; Ori missing with her dagger and Oboro staying alive long enough to ensure Vide's resurrection. Oboro himself, not Arcanette, is the last member the travelers encounter, even if he's not fought himself.
Ori and Oboro both also contrast with each other in their eventual fates: Both, in spite of what the traveler accomplishes, seek to move forward with their plans to Deny the Dawn. But Partitio is able to give Ori hope to the point that she shifts the dagger at the last second and survives her attempt. However, Hikari is unfortunately unable to dissuade Oboro from his nihilism; No matter who Oboro talks to, he inevitably throws himself into Vide's flame.