So, for the definitive answer:
If you came from Wonder Egg Priority , Rika is alive at 14, but her friend died at that age. how old was rika when she died
If you came from a horror anime context, when she died. So, for the definitive answer: If you came
If you've searched "how old was Rika when she died," you've likely encountered one of two heartbreaking fictional characters who share this name. The answer depends on which story you're referring to. Rika is alive at 14