>>96390055Holy reading comprehension.
They didn't refer to Kizuna Ai as a "voice model" because they're training an AI voice model in actuality, they're using "voice model" as another term for "voice actor".
And the reason why they went with "voice model" as a term for "voice actor" is because by kayfabe, Kizuna Ai is an Artificial Intelligence.
Keyword is kayfabe.
"Voice model" is the term used because "model" in machine learning terms, is usually referring to the trained data, but because its just kayfabe, that's not actually true and they're just using the term as a substitute.