From the moment they both met Desmond and Xiauyue had not gotten along with each other, Desmond found the girl too proud of herself which made it difficult to talk to her when one had not somehow earned her respect, and Xiauyue for her side found Desmond being a person who could not be trusted given his long history of lies and wrongdoing in his background.
Based only on the above and on how much they argued each time they saw each other, one might think that they did not have good chemistry in combat ... but whoever thought that would make a big mistake.
Despite the many differences between them, when it came to dexterity and adaptability none of them was anything less than exceptional; which gave them great compatibility when they were fighting side by side.
And when the countdown whispered by Desmond reached zero, they again tested their great combat ability.
