Inari not appearing in World Event

[Shaylynn]

@HounganAtLarge

The battle against Inari is a rare battle that may appear on the map, but only 1 Inari will ever appear at a time. It gives extra rewards”

I do not understand it to be an Inari battle every 6th battles, it does say it is a rare battle.
But with that said I have tested it on 2 account, both in the same guild, both bought tier 4. No lost battles.
Both accounts got the first Inari fight after 40 battles.
It is RARE indeed, and it is ridiculous thar it isnt the same for all. What info havn’t they given us?
But I noticed that an Inari troop appeared in some Fenrir fights.