Please see the Google Docs description of this project, where the full details are explained:

https://docs.google.com/document/d/1XPrbafy3LQbQbxj7VUk3OpLngM_z8Iax48ZrQpcXN2o/pub

This description of the character comes from that document:

James Alviston is the founder and Director of Gravia Technologies. He’s a visionary scientist who discovered/invented the technology to create and control Rifts, which are like small black holes. He’s exceptionally competent, but without any apparent arrogance or contempt.

Alviston is very hands-on with the technology, but he also cares deeply about all of the people working at the facility. He’s protective, fatherly, and warm-hearted. But he also has his own personal goals and agenda, which may end up being at odds with the safety of those around him…

Alviston doesn’t have any specific accent, but his voice is commanding and strong, inspiring, but kind. I'm most inclined to deeper voices, with a definite sense of Alviston's somewhat advanced age.