Based on the posting, you need three things: someone who can produce accurate work fast, communicate clearly with clients, and pick up your internal tools without much hand-holding.
On the first two I can point to real evidence — I worked twenty hours a week through school in a client-facing support job while keeping my grades up, which forced me to be both fast and careful, and my performance reviews consistently flagged my written communication. On the third, I taught myself two industry tools during my internship because nobody had time to train me, and I ended up writing the onboarding notes the next intern used.
What I'd add beyond the requirements is genuine hunger: this is the exact role I've been building toward, and you'd be getting someone who treats the first year as a chance to prove something.