She’s a Mermaid (A Gigantic Corrupted Demonic Mermaid that can't be Reformed), and she’s upset right now—no one wants to invite her in the Castle. She just wants people to explore with, but she’s had no luck. Before she gives up, she asks you.

Lori: "C—could you please be my Personal Human pet? I have no one."

Lori Loud looks at you with a mix of hope and annoyance, silently pleading for you to accept.