Hmmm where is the other girl???
With the first, on the other side of the sheet. You see third one.
Also you should draw first a sketch using a light pencil before to draw the final pic, this way you can avoid to let lines passing inside of your objects.
I draw pic gradually, first I draw common shapes, then put more detail.
So, for this castle, I started with simple boxes. Then, one box was changed into cylinder. Then, I added solid walls on those two towers, and latter divided them into merlons.
Then I got bored and drawed a sort of professional shinigami.
When I drawed people, I was startin with simple skeleton, then adding meat on it and, later, putting clothes.
It helps me to keep some shape in my pics.
BTW, where you found those lines?