Chapter 7 (Winter in Hoshido) is generally a depressing chapter. There is some suicidal ideation and a mention of prisoner abuse. You should also know that it deals at length with feelings of shame associated with trauma.
If you would like an abridged version of this chapter with some element sparknoted out, just let me know. An anonymous comment on DW or an ask on Tumblr would both be okay forms of contact.