Resetting Expectations with Coworker

Hi FGB community! Seeking advice on how best to deal with a coworker who's become a bit arrogant & patronizing toward me. For context, I began a new job in July where my focus is building our brand presence in North America and acquiring new leads. While I'm enjoying the work itself and appreciate the level of trust the CEO has put in my ability to lead as the sole marketer of our region, I'm a little concerned about how a coworker on my equal level (who I collaborate closely and often with) is beginning to talk to me. Since the product is enterprise level & expensive, the actual sales are few and far between. For this reason, there is less focus on his team's output and more on my work in promoting the brand. As a result, I've put a lot of effort into speaking opportunities and recently launched a podcast which I'm ecstatic about. I brought him on as the host because he has a big personality and enjoys public speaking. I'm doing all of the behind the scenes work which I love, such as researching & booking ideal guests, building out the interviews, and promoting the content post-production. But now, I'm starting to sense a belittling view toward me as something like his assistant, which is not only disrespectful to me as a marketing professional, but also misguided. I'm a pretty chill person and thrive on creative collaboration, but I'm starting to get annoyed at his condescending tone. For instance, he repeatedly asks me the same questions because he doesn't read my responses, calls me without a heads up and asks me to do obvious things that I'm already doing, has asked me to build his personal brand, etc. Additionally, I'm an introvert/peacekeeper and quite a few years younger than him. I don't want to rock the boat as we'll continue to work closely together, but I feel like I need to reset expectations. Any suggestions?