Hi

I've got a few questions:
1. How kamihime works (sounds stupid, doesn't it? ) i've got them as long as i've got a kamihime weapon or they work independently once they're release? (i ask because i've got a lots of rubble in form of R rarity weapons)

2. Do i have to keep R weapons? Some i must keep until i'll get a better counterpart. I know that i must keep at least one weapon from every element and type of weapon. What about rest? (Inventory: 74/90 where 45 are R rarity weapons)