*Yuma paused. This next part was going to be the hardest, most difficult part to tell her.*

Because of ZEXAL. Because I took down the other two demons while using that.
They feel threatened by it, because according to them, that power is one of the few things that kills them.

So all three of them are looking to kill me and they're preparing something to do so.

*He paused for a moment, as he brought his arms around himself in a half self hug.*

I don't like the idea of 'killing' anything. That happened with the last two because it was in self-defence and because they were threatening to use our world as a feeding ground. Now these want to do the same, but they want to get rid of me first.

I don't want revenge against them. I'm angry, sure, but I'd never seek revenge, but they will come after me eventually and when they do, I will have to fight them.
I need to make sure they don't hurt anybody else. I need to make sure they only target me and when they do... I need to find a way to win and take them down... or find a way to take them down with me if I lose, because if I don't...
.... they'll harm billions of innocent people.

*He closed his eyes, allowing tears to fall from them.*

I think this is what the door meant when it said that this power came with great risks and hardships.