When Soran is shocked to learn from Elder Shinchuu that his grandfather Chou Kaigi was a member of Zensei, the Tenshi and Rikukin explain what happened to him.
On their way back, Soran is invited to a party by Rikukin's granddaughter Riku Rinron...
That's why she doesn't remember 
anything about herself.
.لهذا السّبب لا تتذكّر شيئًا عن نفسها
Deshalb erinnert sie sich
an nichts aus ihrer Vergangenheit.
Por eso no recuerda
nada sobre sí misma.
Por eso no recuerda
nada sobre sí misma.
È per questo che non ricorda
niente del suo passato.
Por isso que ela não se lembra de nada.
Вот почему она ничего не помнит.