Romilda has a celebrity crush on Harry throughout the sixth book, but she sometimes crosses the line. She introduces herself to Harry on the Hogwarts Express and invites him to join the group in her compartment, but not without making snide remarks about Neville Longbottom and Luna Lovegood, whom she considers "uncool." Harry stands up for his friends and refuses her invitation. Later in the year she attempts to trick Harry into taking a love potion, but while he takes the box of chocolates she gives him, he is wise enough not to eat them. Several months later, Ron Weasley accidentally eats several of Romilda's doctored chocolates and is affected by the love potion, forcing Harry to take him to Professor Slughorn for an antidote - which leads to Ron being poisoned by accident. Following Gryffindor's Quidditch victory towards the end of the book, Romilda is outraged to see Harry kissing Ginny Weasley, whom he starts dating shortly thereafter.