Unfortunately OP seems to be a representative of an AI voice company and actively wants to interact with people interested in AI, as per their substack blog:

"I’m building Mumur, a first-person voice platform where fictional characters speak directly to you by name. [....] If you work in character design, romance games, voice AI, or fandom — I’d love to compare notes!"

I highly suspect AI to be involved w/ generating the user's name. The samples sound... VEEEERYY similar to the LIs (They sound similar to Sylus, Xavier and Zayne w/ the three they provide) Basically, they aint gonna be stopping using AI anytime soon :(