Luo Si is just an ordinary NPC. Because she was a child during her lifetime, she cannot grow taller and remain a child after her death.
In fact, Luo Si had no problem with it becoming weird. After all, there was no difference between living and dead to her.
Boss: I'll give you a salary, and then you'll have to run back and forth in countless small worlds. Of course, it's up to you whether you want to do it or not.
Gray Supervisor: Can I get a discount if I don't work?
Boss:…………
Intention: Written for fun