Paradise Lost
Akane lived a relatively happy and peaceful life for a good long while. Her mother was an SS-rank ghoul killed by the CCG along with her younger sister when she was 13 which gave her an intense distain of investigators (and humans in general). Grew close to her father and Suoh after, along with a girl her family took in who planted some interesting ideas about humans in her head.
A Giant Salamander
Akane was shocked upon finding Shii-chan, but eventually came to accept her and Masaru somehow. It's a big step for her who usually cuts down investigators without question.