So Sorry is fully safe in Geno, but Glyde takes some time.

mad mew mew:

Killed mew mew, but on neutral. (You do have to get access to Papyrus’ house for mew mew so she’s safe too)

Well you're controlling frisk so really you're killing the monsters

I just did Glyde on geno, I’ll have to abort geno at Undyne for so sorry

napstablook

Real

alphys

Napstablook can't be killed

But alphys just can't be killed in undertale

She hides in the true lab and you can't do anything about it

I mean alphys has a reason for evacuation, she's not immortal. Napstablook can only be killed by magic. Napstablook could've also helped evacuate

Still alphys stays alive in every route no matter what

In most neutral endings she kills herself

it's not canon

Napstablook is already dead