Me (quoting Ester 9:7–10):
7 And Parshandasa and Dalfon and Aspasa
8 and Porasa and Adalya and Aridasa
9 and Parmashta and Arisay and Ariday and Vayzasa,
10 the tensome of the sons of Haman ben Ham'dasa, terrorizer of the Jews, they killed....
My kid: Why are the ten names split up over three p'sukim?
Me: I don't know. Maybe it was too long for one?
My kid: I've seen p'sukim longer than all three put together!
Me: Good point.
The truth is that, as noted in a comment, this question may be a little weak — perhaps that's just how the authors of Ester liked to write — but the same question applies to Sh'mos 1:2–4, where I expect a stronger answer than "the author just liked to write that way". So consider my question to be about those (and similar) p'sukim in Chumash instead, if you prefer, although I ideally would still like an answer about the specific p'sukim in Ester quoted above.