I would like to make certain what you mean by 'hold your fire'.
Do you mean by that 'cease the fire'? If not, I would be sorry for having made a mistake
and like to ask you to inform me of another expression for 'hold your fire' to obtain a correct translation.
Rumiko Takahashi, the author of Ramma 1/2 had been using the word 'Darling'
in one of her anime works 'Urusei yatsura' (the englich version: 'Lum', 'Lum returns')
without translating it into japanese to call her allegedly fiance Ataru Morboshi.
I think therefore it appropriate not to translate this 'Darling' into japanese.
You would pronounce 'daarin'.