I followed those things and she unlocked. One thing I noticed is that certain characters wouldn't join your team if you were using a certain person. For example in the level where you unlock Lady NO i was using Nobunaga and she wouldn't join even though I had done all the conditions. I switched to a different character for whatever reason and sure enough she joined.
Try using someone else like the first person selectable from her clan. Other than that I don't know what to tell you as the method in the guide worked for me.
Ranked #1 in Utah, 1'st to 100,200,300k in Utah
235 retail complete, 26 arcade complete
Gsl season 7 champion!