It was not accurate to say that she had died in the hands of the four of them. To be precise, she should have completely died in Chu Nan's hands.
Although the three of them had also contributed greatly, the most important thing was to completely trust Chu Nan and synchronize their Internal Breath with him without holding back. They handed all the controlled spatial energy to him to adjust and cooperate with his actions wholeheartedly.
If there was any mistake, it was very likely to cause serious consequences, let alone achieve such a shocking result.
If even one of the three of them did not trust Chu Nan and hesitated for a moment in the entire operation, the final outcome might be very different.
Therefore, it was indeed the credit of the four of them to be able to kill Supremacy Mal in the end.
However, no matter how proud Princess Romanti was, she had to admit that Chu Nan was the key and core of this operation.