There's no secrets between them, for how could there be? Not since they had first interlinked three months ago, as if they were made for it, both their current incarnations and the heritage of endless repetition, of thousands of lives past, the eternal cycle of a serpent that feasts on itself, growing ever stronger so it can consume even more, to kill and eat and eat and kill.
They are Ouroboros, armor-clad, with heavy wings and sharp claws, every curved limb forming another extra blade to fight with, those bodies that were made specifically for carnage. Insides carrying the weight of another's consciousness, a familiar heaviness that leans against your own. And they don't talk about what they see in there when they're inside that frail shell of emotion, there's simply no need.
Sena's not what he thought she'd be like at all. Lanz may not have much of a brain for planning or tactics, but he's not stupid, especially when it comes to parsing out emotions. She works so hard, shines so bright, and sinks so low. So it's gotta be up to him to help lift her up, since they're more than just strong and hollow when they're together. Sena doesn't look at him, she looks at his back, just like she looks at everyone else's. It's only when they're trying to break out Ghondor does he manage to finally lift her up and help her see that she's a star, and everyone will hear her roar.
Before they became Ouroboros, she dreamed small. Lanz isn't smarter than Taion or faster than Mimi and only equally matches her in strength. But when they fuse for the first time, he shares his memory of Joran's strange smile farewell before being buried under heaps of rubble and fire, and she shares her loneliness. In the golden land she feels Lanz smile, both of them reveling in the fight, doing what only they can do. They are kindred spirits, twins of protection and destruction. When the battle ends and they fall apart, a weight she didn't know she carried lifts off her shoulders, and Sena can finally breathe.
She's so damn exhausting. Headstrong, blunt, cocky. Complex, too. Taion wouldn't have named the last one, but he watches Eunie tremble and refuse to speak, and he doesn't pry—rather he can't. He can't make sense of whatever's in that jumbled half memory she found after seeing the scars of war, so he doesn't ask. But he can offer tea to soothe, help cover the blind spots she doesn't know she has both in and out of the fray. Circumstances demand they trust each other, and he does, quietly hiding it underneath prickly layers of bickering and exasperation.
Eunie can't stand pretentiousness. Even small things like Noah's insistence on off-seeing everyone drove her up a wall, back when they were still a part of the colony. So being paired off with Taion was a definitive nightmare at first, but she's grown accustomed to reading between the lines with the way he talks and acts. When they're fighting Isurd's echo, she can sense his anxiety in the air, suffocating and dense like the humidity clinging onto her feathers. The High Entia doesn't hesitate to shove him out of a laser's sights and into action—sparks knows he needs it—the two of them disappearing with a splash and emerging from within the decadent armor of an oracle.
When they're apart, Noah finds himself surprised with his own selfishness, how he steals not-so-secret looks at Mio, how he sleepily reaches for her in the middle of the night, how he doesn't hesitate to destroy his own body, if it means a sliver of a chance they wouldn't be separated for any longer. All of it going back to her, when they first Interlinked three months ago, awakening to that power born from his desire to protect. It's supposed to be scary, to admit that he understands N, but how could he ever completely deny his other self?
If there's anything she's learned over the last month, going through M's memories of a thousand lifetimes and then an eternity, it's that she's always been Mio with Noah, and then M with N. Every lifetime reluctant to love him because of the brand on her neck, every final moment together cut short by Moebius. And then M gave her the greatest gift she could ever receive. Life, time, hope. It's only thanks to that sacrifice that she can finally take Noah's shattered hands with her own, helping him rise to face the future Ouroboros wants to shape.