"Felix. I'm afraid you have to evolve or you will die this time."
Felix still remembered the day Theo said those words to him. Theo finally showed such a weakness because the enemies were simply too powerful.
And looking at the situation, he felt this was probably the situation Theo was talking about.
When he was with Ava, he had an easier time since he could focus on two King Class Monsters. Now that he had lost her, if he didn't make the correct move, he might die without accomplishing anything.
'He has entrusted me with such an important task. Right now, there are four King Class Monsters before me. Although they have been injured quite badly, it doesn't change the fact that I'm not strong enough to fight them.'
Felix couldn't help but relate to Theo's words. He told him that he wasn't strong enough to protect everyone. And currently, Felix knew he was also too weak to protect them.