After Persia called Ran to join the newly formed third generation of Weiss, as a constant reminder of the purpose behind his actions, Ran takes on his sister's name and wears one of her earrings, which were actually a gift from him to her.
Ran takes on his sister's name. Ran wears one of her earrings. Persia called Ran to join the newly formed third generation of Weiss behind his actions. This was as a constant reminder of the purpose. Her earrings were actually a gift from him to her.