It is completely true, that while she isn't sure about a lemure Keltham is still Keltham when he puts an intelligence headband on and she does not actually feel sadness or guilt about Keltham putting an intelligence headband on. About the fact he was in pain, yes, about the fact that it felt to him like giving up and he was willing to do it anyway, yes, about the fact he put an intelligence headband on, no, because that's in fact not death and not even a bit of death, any more than learning new math is death.
She is not going to say that. It doesn't seem helpful.
She's also not really sure this is on her? Would Keltham not have done it if she'd defected with him to Iomedae on day one?
She is not going to say that either.