haku's ice would be crystalised. its stated she can turn anything to crystals except for chakra in its purest energy form. for example her jutsu didnt work on a bijuu. haku has no chance of breaking through gurens defences or countering her crystal shuriken barrage.
moreover guren was fast and strong enough to battle with base naruto multiple times and defeat him every time even in a weakened state, as well as oneshot hinata.