In Zero-One, I noticed Azu using a familiar phrase -- "singularity point," to mean the catalyst that triggered each Humagear's moment of singularity when they achieved sentience and emotional awakening. It took me a moment to place the term from Kamen Rider Den-O, where it (as the English translation of Tokuiten, "unique point") was the term for an individual who remained constant when the timeline was altered around them. Here, they used the phrase in English, though, so I'm not sure if it's a deliberate reference or a coincidence. (It's the Wiki's translation anyway; the subtitled Den-O episodes I saw called it "Singular Point.")