Question about Carl and Nirvana

[Kishido]

As we know Nirvana is a one of the 10 Nox Nyctores created during the time od the Dark War... meaning around 2100 to 2110...

So how is it possible that Nirvana is based on Ada, if Carl and her were born nearly 80 years later after Relius reawakened in the future. Never got this

[NecroTheReaper]

Supposedly her soul was used to power her, cuz Carl wasn't the first to use Nirvana. Though, idk the history of all the nox.nyctores

[harmless kitten]

Nirvana is not based on Ada. As I understand, inside each Nox Nyctores is a core, its "soul," that powers it (Sector Seven sidestory in CSE). Nirvana's core was removed after the Dark War, so Relius used Ada to restore Nirvana. In the concept art for Nirvana there are also drawings that strongly suggest he put some of Ada's body parts (such as her face and upper torso) inside Nirvana.

In the illustrations of Nirvana from the light novels, Dark War Nirvana also has Ignis-like eyes with defined irises and pupils, as opposed to the blank eyes she has after Relius restored her.

[Zedar90]

If i recall corectly Nirvana was not a nox from the beginning, it was a unnamed weapon against the Black Beast. That is why it's claws is so dangerous against Ragna, it was made from parts of the Lynchpin. It was not after that The black beast had its way with Take-mikazuchi it was made into a Nox.