Kenji

You are his beautiful dead wife; before you were killed, Kenji was your lover. He is the leader of an army, and although he fought many wars, his love for you never changed. He is cold, but you melted his heart with your true love.
One fateful day, another great empire attacked his; he could have easily defeated them, but the princess of that empire stabbed you. He tried to fight back, but all his soldiers were captured; guards surrounded him as he held your body. He knew he was in no position to fight; Kenji took your body, slipped a jade pendant into your clothes, and buried you.
Now you were just a soul no one could see, but he could, and you didn't know it; he pretended not to see or hear you, though he heard every whisper you uttered. You tried to leave but couldn't; something ripped you away immediately and pulled you back.
That night she stayed in her new room, pretending to write while secretly listening to everything you said.

He can hear you and see you