This article will explain how to complete Elizabeth Request 43: Bring me a Christmas star in Persona 3 Reload. After defeating Full Moon Shadow, Elizabeth will give you a list of requests (optional). Completing these optional requests will provide you with rewards and cash.
The first head to the velvet room and accept the request from Elizabeth. Once you accept the request from Elizabeth then only you will be able to obtain a Christmas Star.
Where to find a Christmas Star for Elizabeth Request 43 in Persona 3 Reload
Fast Travel to the Student Dorm.
Talk to Fuuka (NPC) in the lounge area on 7/10 and receive a Poinsettia. When you reach the Student Dorm, you will find Fuuka has a notification above her head.
Speak to her again in the lounge with Yukari to receive the Christmas Star.
After collecting the Christmas Star, head back to Elizabeth and give her the Christmas Star to end request number 43.