Hey! That ships with my voice! Well, a synthetic version of it anyway. It used to be horribly robotic, but they've improved it quite a bit for mimic-3. Worth a look.

I wrote a blog post recently which talks a little about the origin of my voice in Mycroft, in case anyone is interested. https://popey.com/blog/2022/10/blog-to-speech-in-my-voice/

The bonus with mimic is that it runs reasonably well on constrained hardware (such as an RPi).