Disappointment

Once he said those words, Yuki deactivated the cylindrical pillar which he had created using his ability to corner I(1). Hearing the words Yuki had said broke 1 as he had nowhere to go. If he didn't succeed in his mission, he would get killed by Mr. Y. However, if he did try to complete the mission, Yuki would kill him. Either way, he would die. 

"I'm not going to give up. I can't. I would rather die trying to live than to die with my will shattered," 1 said under his breath before signalling to II(2) and III(3) that it was time to give it their all. They would need to fight as if their lives were on the line because in reality, they were. Failing to defeat Yuki would mean death. 

"Activate ability: Bullet Barrage" - I

"Activate ability: Sword Dance" - II

"Activate ability: Second Slash" - III