Siren the Rogue
A young mouse about Jerry's age and height was sneaking around the castle, looking quite sneaky and mischevous. When she jumped into a window, she saw Alice sound asleep and decided to take action. She jumped down from the window ledge and jumped onto a bedtable, taking out a rope and latching it onto a hook. She used said rope to swing over to the bedtable closest to Alice and opened the drawer, taking out what looked like a locket. She then dropped some mouse hair that looked like Jerry's and ran off as fast as she could.
Siren jumped up to the window and bragged to herself as she admired herself in the mirror with her reflection. "You sure know how to rock a black stealth suit Siren." Siren ran across the wall and jumped off, heading off into the creek and jumping into a boat. When she started rowing, she looked at the locket and felt as if she was going to succeed at her mission. "You're gonna please Sabre like a charm. Once he sees that other mouse framed, I'm in the goldmine."
Alice was in her room as she yawned and stretched her arms, waking up to find that her bettable drawer was open. "That's odd. I don't remember opening this." Alice looked to see that her locket was gone and she became worried, finding the fur piece Siren left and becoming suspicious. "Jerry's fur color? But he would never do something like this; he's too nice. He only does it to those who deserve it." Alice thought for a moment and decided to go see for herself what was going on, not wanting to assume bad stuff about Jerry. "I'll have to visit him myself."