Wow ive read thru this entire thread over the last few days casual boredom and general consensus is no one else likes gork like seriously pretty sure I was the only one hoping for gork as a drop eventually got her and was so stoked about, idk what it is but I like her she is completely different then every other girl as she is the only orc ive seen so far and as an avid collector I can appreciate that uniqueness in my harem collection.
also on the math side I did approximately 1600 battles and got 12 girls putting odds at about 0.075% average on a not insignificant sample size, needless to say this cost me a lot of kobans but with these odds if your actively playing almost every day and getting the daily mission bonus it is possible to get all event girl drops from boss girls, might have to use refills on the odd event to get the last girl or in my experience likely have to use refills for the legendary girls but it is mathematically feasible to get all non pachinko girl throughout the year without buying additional kobans, just need to put the time in playing every day practically and save kobans, BUT this event is definitely the exception unless you already have all non pachinko girls and a lot of kobans saved you wont be getting them all without buying in, but at the end of the day who really cares even if you don't get all of them you still have the opportunity to add a lot of usually very expensive and hard to get girls to your harem TY Discord for this event