Kreutzer often times has a dark sense of humor, so the bombs serve as a metaphor: Kreutzer wants to kill herself. Her mind is overwhelmed with guilt over her past actions and she wishes for nothing more than for death to embrace her. The varying strength and radius of each bomb represents the damage each of the dolls, each piece of her personality, can inflict on others. Leaf, for example: young, innocent, full of potential; her bomb represents all of the great good, or evil, she's capable of.

I tell you because as her housemate, you deserve to know the truth behind her actions. Her pride refuses to let her tell you herself. Pride is an emotion I'm not capable of, so I can tell you this freely. She was killed back home, but being brought to Mayfield denied her the opportunity to stay dead. She traded in memories of home to create Leaf and the other low-tier dolls so quickly; because I was made long afterwards, I myself do not know what she has given up. All that is clear is those memories robbed her of the only chance she had at peace of mind; she's mentally distressed and it only grows worse as time progresses. She may be making few friends here, but the guilt and dark emotions in her can only be contained for so long...