The Voice Acting. . .

[Berethos]

It's not asking too much. It's really as simple as hiring someone else for the job.

Well, except for instead of just looking to hire one person who can speak Spanish, what you actually have is a contract between your business and another separate business that specializes in a specific service that you need. You can layer on additional requests or requirements, but still have to keep budgetary (and timing, since this is a company that works with others and well and can be pretty busy) concerns in mind, and if you end up too demanding they can just opt to not do business with you any more.

Not really as simple as just hiring someone else.

Maybe if it had been an audio book or something, but I feel like someone gesturing wildly while grinning madly with crazy eyes, capping it off with a crazy maniacal laugh, would probably not be whispering in a scheming tone.

Not whispering, nor scheming.

Asahi, in English, was introduced as soft-spoken. That's a trait the English scene continues, where the tone is mocking, before it transitions into building intensity and obsession.

Of course, maybe what's really going on is that both work, and you've convinced yourself that only yours works. Whether it really does fit might still be up for interpretation though, since neither of us actually know the language that you think fits better.