Namely, someone who thrives with a lot of responsibility, freedom, and latitude with decision-making. Who thinks laterally and brings some "hustle" to the table, instead of simply awaiting orders.
We're currently remote, so no one's gonna stand over your shoulder and count hours in your seat, but this position is early/pivotal enough that the success of the company will be a function of this person's impact. It's gotta be someone who understands this and knows how to row their own canoe as well as row crew.