User blog comment:Sweetraindrops/Last Rare Summons for awhile... 1.2.14/@comment-98.210.13.190-20140105192609

You've literally gotten more 5's out of 13 packs than I did in 130, consider yourself lucky.

Also, it's a case of simple probability. Assuming the 50+ 5's are equal in chance of payout (which they really aren't, doji is much, much rarer than yoto.), you can get a 5* out of every 20 pulls right now about, getting your specific 5 is 20*50 = 1000 pulls = about 166 sixes, you've only done 13, so t's entirely a stretch that you'd be able to hit her within 13 sixes.