Prepare them to speak: build the narratives, talk tracks, and supporting material for Replay keynotes, customer meetings, fireside chats, and briefings, partnering with Product Marketing on the technical story and positioning, and running the prep so they walk in knowing the material cold. Run their social and short-form voice: own the day-to-day presence, drafting posts, reactions, and takes in each founder's actual voice, knowing the difference between something that lands with developers on X or Hacker News and something that gets ratioed, and building their following as a channel you're accountable for.