Discusion 4-A Question

My question for this week is: Why did Liesel get such a good relationship with Ilsa Hermann? They don't seem to spend much time together over the course of Liesel's stay on Himmel Street. I kind of see that they both share a love of books and words, but Ilsa seems distant. I also wish the author had gone more in depth on Ilsa's story because she had such an impact on Liesel, but we don't know a whole lot about her life.