I just received Sieg today, and Illya's mother and Illya's sister too.
Sieg was the first one I just got, but now Sieg's NP is at level 5
The second one I just received was Irisvel.
Now the NP is at level 5, but the most interesting thing is that its name is Holy Grail, but I understand the origin of that.
And the third was Chloe von Einzbern.
And Chloe is already in NP at level 5, and I had to grail her to level 90, because in 1 year, Chloe will be the Grand Archer.
I already have a feeling it's going to be a sibling fight, even though I have Illya Caster and Chloe.