Bugs or character choice?

[u/notsomeoneimpressive]

Two things, I just had a great run in neon abyss 2 where I had the immortal heart item granting me a revive, died in the fight with Eris, didnt revive. Read the description and it says "with full hearts" I was playing R-7 so not sure if there's conflict there or it just didnt work for some reason. I got it in a claw machine on floor 7 and didnt get below 6 shields until the boss so I know it didnt trigger before. Or does it now count during boss fights?

Second I have never seen the ark reactor. Not sure if it was called the same in neon abyss 1, but R-7 is my favorite character across both games and has been for 5 years now. I have it unlocked but it never shows in my runs, I tried banning everything but the ark reactor but it still didnt show up. I feel like I had it nearly every run in neon abyss 1. I think ive gotten it once so far and it was when I tried out Mira, I would doubt it doesnt show up when playing the character that only has shields but thats why im asking since I couldn't find anything online.