I actually the fact that the FL didn't suddenly go from 'Oh I transmigrated' or suddenly became too calm after dying or after rebirthing.
I think the FL's reaction was what I love when she woke up. This is how usually those who was traumatized a lot would react.
Ah, transmigrated into the body of a Young Miss that seems to be spoiled rotten but having such a caring grandfather really makes your heart squeeze and tighten.
Aww man, 16 is already way too old to set up a nice story .. now she has to handle the messed up past of the previous body-inhabitant and I see the cliches commin .. feelsbadman