Not vulnerable, sure. But even accounting for title inflation a "senior partner relations manager" doesn't sound like a random line employee. It's very hard to run a company with leadership publicly sniping at each other.
That role is a random line employee. "Partner Relations Manager" is a role that interfaces with customers of Unity with Enterprise licenses. They don't have direct reports. The "Carol" in question is Unity's CMO.
It totally sounds like a random line employee. Partner Relations Manager just means they interface with external customers. Senior just means they probably aren’t a new grad. It’s a regular old line position.