The phrase "to do the honors" means to perform a special or important task, often to signify respect towards someone or to take charge of a particular duty or responsibility.
Sentences with «to do the honors»
If your new acquaintance does you the honor of opening up, don't make them regret it. (inc.com)
How do you honor someone's memory without getting stuck in the past? (bookpage.com)
Moreover, it requires not only forbearance from evil but active pursuit of the good: in this case, doing the honors for her brother. (firstthings.com)