Didn't know whether it ate Reimyu's corpse or not, but based on the remaining accessory/braids of Reimyu, it almost guarantees that she scavenged the corpse of her sister.
What happen ?
atelieryuuma said:What happen ?
Look at the most-right part of the second post (post #80350), Reimu is crushed by a car/bike/vehicle, and died. So now they didn't have anything to eat, just kept waiting and waiting for their mother to return. And finally, died from starvation.
It seems that marisa become Insane
Reimu went to get a pack of cigarettes and died on the way there