Board Thread:General Discussion/@comment-24431758-20140313050841/@comment-98.232.231.170-20151122211253

A few things to point out.

In some of the flashbacks of Bam's, explaining how he knew Rachel - at one point he states that he tried building up to the top of the cave and leaving it. At that point, he also said that he tried to get out, and that she came to him from above. I could be misremembering, as I couldn't find the exact quotes while quickly reviewing, but it may be that Baam accidentally caused her to fall down to the cave with him.

This also falls in line with other implications that there is a world above the cave, separate from the tower. The allusions to a world above in flashbacks, the constant idea that there is a "real sky" rather than just a fake ceiling at the top of a tower floor...

Perhaps Rachel lived on some kind of "surface world", and Bam unknowingly and unintentionally caused her to fall down to the cave with him. She could easily have played with him and taught him initially to have a companion... but then he opened the tower. I don't know how she knew about the tower - so she could have also learned about it from something else while down in the cave (but I doubt it). In either case, she took that opening as an opportunity to finally go up and possibly return to the world she lived in for so long.

At that point, her hatred of Baam makes perfect sense. He "took everything from her" in that he caused her to fall into the horrible cave - whether he intended to or not.