Complex sentence: She is the victim of forced incest, all of her brothers violating her when she attempts to settle down with a suitor, which makes her become colder and crueler as a vampire hunter, although Kikuchi fails to explore her reactions to this event.
Split into simpler sentences: She is the victim of forced incest: all of her brothers violating her when she attempts to settle down with a suitor. This mad her become colder and crueler as a vampire hunter, though Kikuchi did not thoroughly explore her reactions to this event.