Setsuna and Towa hire Moroha to help slay Zero. The trio successfully track Zero down, but Riku is there to protect her. They stand on the battlefield where the Great Dog Demon took his last breath.
That's why you shouldn't have 
given him the Silver Pearl.
.لذا لم يكن عليك منحه اللؤلؤة الفضيّة
Por eso, no deberías
 haberle dado la Perla Plateada.
Te dije que no deberías
haberle dado la Perla Plateada.
On t’avait prévenue
de pas filer ta perle.
Ecco perché non dovevi dargli la Perla Argentata.
Por isso a gente avisou
para não entregar a Pérola Prateada.
Поэтому и не надо было отдавать ему
Серебряную Жемчужину.