Does anything about my chara scare yours?

Only what she did to him. (Though she doesn't know yet, actually, but it will scare her.)

oh Rose sweetheart

yeah he's...>.>

never telling her that

he's not telling anyone who doesn't already know that it was Rose who changed him

even if it gets out that he's immortal and it totally should at some point

he's not letting anyone find out that part

Yeah, she only remembers bits and pieces of what happened. At least I think she does. She remembered enough to laugh in the Daleks' "faces" about what she did to the Emperor.

I assume she knows that she brought him back, just not the consequences.

even if he can't protect her from anyone else, he can protect her from this

Aw, Jack.

ah, true, yeah