Don't say it like that. Your existence isn't cruel. Besides, you don't have to tell her everything since we're here in this world - she doesn't...

[Encouraging lies like this feels so wrong, especially when he's telling the Fon Master of all people to do it! But this lie is better than the one Ion is already telling.]

She doesn't need to know that the original Fon Master Ion died, only that replicas were made and you're one of them. Then she won't expect you to know everything that he would. Don't you think it's better that way?