Ignore the people suggesting a lot of people get her wherever, I think. They almost certainly don't have a large enough sample size to make that sorta statement.
There are a lot of rares to pull from in Kage (I believe it is nine). And that means that your rare drop (around 60 scrolls still) will give you a one outta nine chance for her. Much more likely than not that you don't get her. But still... about 11% of the people would get her as their very first rare pull.
Basically.... LUCK.
8 rares, but still basically luck
(Although, a lot of people on my server have her, like a 4/5 ratio out of those who do have kage rares, maybe 3/5)
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