What do you need the cross (十字架) for?
They're not on the item list on this wiki....
Yes the wiki is still incomplete, but i will add it once i have more information.
To be honest, i don't really know what they are good for. I used it in battle and it just killed a random enemy. That's all i know so far, sorry.
Well , thank you for the response anyway XD honestly I was hoping that there will be items to prevent demon blade from betraying you lol
Don't lose your hope! Maybe there is way and we just don't know about it or there will be an option in the future :)