Meo (my WoL) wasn't shaken at all, mainly because she never was a "hero" to begin with. She does things because she finds them interesting or because they help someone she cares about, not because she believes in a higher cause.
Naturally, that also means that she has no worries about what she might turn into or the implications of such immense power in one single human being

I'd really like to know what Thordan said in Japanese and French, because in German he just told me I was foolish, no "who/what are you" moment at all. I wonder if it was just something the English translators did to make it more obvious that Thordan was shocked how powerful we had become and that we seemingly (from his perspective) had no concience about how to use that power "the right way".