Ah....?

Have you realized it?

After you died, because of your attachment to here, you became an earthbound spirit.

However, that attachment was too strong... You turned a blind eye to your death.

And as time passed, you started turning into an evil spirit.

If left alone, you would probably begin attacking anyone indiscriminately when they came close.

However, you were a powerful youkai so... It wasn't something I could handle on my own.

So I got that oni to help me.