Something I appreciate about Nishi's writing is how she understands the story elements she uses and how to give them a creative spin.
It was a given that, when Iruma finally revealed he was a human, Alice would accept him. In fact, it would not have made sense for Alice to get upset at Iruma, given his character. It may even have felt tiresome for him to get angry at Iruma for it.
It would have also been so easy for Nishi to have Alice not care nore make a big deal out of it. This is a trick she has done in this series before, after all.
However, rather than doing either, she decided to let Alice have a messy emotional turmoil based on the reveal, that nonetheless still has Alice not upset at Iruma over it.
Because it is a massive revelation that completely changes how Alice sees Iruma. But which can't shake the bedrock foundation that is Iruma's relationship with both Alice and Clara.
And rather than ignoring the "lying", the manga has Alice not only quickly understand that Iruma was justified in keeping his status as a human a secret for reasons other than him, but point out that the fear of being marked as deceitful and untrustworthy would in turn feed Iruma's fears of being found out, making it even harder to speak of it
Instead, Alice sees it as his own personal failure for not noticing the burden Iruma was carrying (his own personal flaw) and questions if he is worthy of being Iruma's soulmate.
Concluding with the final note of reinforcing his desire to be by Iruma's side no matter what.