There is a fragile balance between Evil and Good/ Dark and Light. For Charlie she walks that line of balance every single day. Between her 'boyfriend' Peter still having a bit of bad in him, and her having all of his evil powers inside her. It's hard to keep the peace. Especially when her father and her entire family disapproves of him. Including her step-grand mom Regina, Rumple, Snow, Emma, Kilian especially Killian, basically all of StoryBrooke, But surprisingly not Henry. Along with Her boyfriend being a villain, there is also the many threats against StoryBrooke. Evil plots and such. Controlling her own magic, the inner struggle of going Dark or staying Light. And so much more. It all comes down to the age old battle of Dark V.S. Light