J.K. Rowling and Serena Williams are stuck in Library Locked-In Overnight and forced to have a deep conversation.

"Honestly, Serena, sometimes I feel like writing characters is almost as grueling as facing a Grand Slam final," J.K. Rowling sighed, adjusting her glasses.

"Tell me about it," Serena chuckled, leaning back against a towering bookshelf, "Pressure is pressure, whether it's a plot twist or a match point."

"But the magic, Serena, the magic of creating something from nothing, it's a power akin to your serve," Rowling mused, gazing up at the high ceiling.

"My serve is all about confidence, believing in that power within," Serena responded, flexing her biceps playfully.

"And my stories, they're about giving voice to the voiceless, empowering the underdogs, just like you dominate on the court," Rowling stated firmly.

"It ain't always easy, you know? Facing prejudice, doubters... it's a constant battle," Serena admitted softly.

"I understand that struggle intimately, facing criticism and expectation, it's a weight that can crush you," Rowling replied, empathy evident in her voice.

"But we keep going, right? We keep swinging, keep writing, keep fighting," Serena said, a fire igniting in her eyes.

"Because our stories, your game, they inspire others to find their own magic, their own power," Rowling affirmed, a smile gracing her lips.

"Exactly! And that, my friend, is a legacy worth more than any trophy or bestseller," Serena declared, her voice resonating with conviction.