Madam, I am sorry that l can't swear to you. I can not be your knight because I won't belong to anyone.

夫人，很抱歉我並不能向你發誓。我不能成為你的騎士因為我並不會屬於任何人。

It is my destiny to protect all the ladies in the world. That is the reason why I am still living in the world. It is my purpose to protect all the women and bring them happiness.

保護這世上所有女性是我的命運(使命)。那是讓我如今依舊存在於世上的唯一原因。保護所有女性並為他們帶來幸福是我的義務。

Please do not keep me beside you. One day I will back to you and bring the happiness that you desire at to you for sure. And this is the only promise I can give you. 

請不要把我留在你身邊。總有一天我一定會把你所期望的幸福帶回來給你的。然後這是我唯一給予你的承諾。