She, the hidden number one in the world of killers, lost her life because her sister took on this false reputation.
She died together with her enemies, but lost all her memories.
She was a mute princess who was killed on her wedding night. Once she was killed, she had no memory.
She has a husband who loves her, parents who value her, and a strange sister.
"You are my princess."
"You are my sister."
"You are my fiancée."
Who is she?