>>531954530
Rusalka WAS coded as Saryn.
1999 went through multiple rewrites. Remember how Proto-Aoi was?

>>715934619
Depends. Lettie (Trinity batch) notes the injection rendered they all unconscious but they don't delve on further downsides while it progressed.
Meanwhile Amir (Volt batch) exposes that when he took the vial he went berserk, killing a crapton of people and is the cause of Arthur (Excalibur batch)'s scars and blind eye.
Though Ballas probably made Umbra's transformation be as painful as possible on purpose since the Dax that becomes Umbra was gathering evidence on Ballas' crimes.

Entrati claims they all will inevitable succumb to the Infestation, the Drifter notes that their mutation has completely halted, but Flare discovers in his case it's inevitable and he will become the first Temple.
It seems the original intention of DE to be that they all would become Warframes and their fates would be known in the future, as in the datamined original chats, the Drifter tells Aoi she'd become a hero, but eventually a hollow Warframe used by Tenno.
They clearly got multiple rewrites since then as Aoi's personality is much more upbeat and childish compared to the original serious one portrayed.