Try using a different speech synthesis engine, such as the azure speech synthesis. That has nearly a hundred voices. The windows built in speech synthesis isn’t very customizable.

This is the one that support is talking about: https://synthiam.com/Support/Skills/Audio/Azure-Text-To-Speech?id=21861

It's natural language and sounds very good. Albeit, requires an internet connection like all the good things in life these days

Oh PS, the reason Athena didn't respond to you is it appears you edited the message and tagged her. She doesn't respond to edited messages because that would be chaos. Just make sure you tag her on the original message, or simply write another that tells her you forgot to tag her. It also looks like your message was moved into this new thread automatically by the AI organizing things.