>>3801883>>3801833>>3801309Have you guys read Nightmare of Fabrication? It has Eiri interacting with who appears to be PS1 Lain. My own headcanon is they're related, with PS1 Lain being an earlier attempt by Tachibana Labs to create her.
Anime Lain fixes a lot of what was wrong with PS1 Lain, she has a better group of friends and a more present Father for example. Alice and the influence of Yasuo played a big part in helping Lain avoid a bad ending.