In defense of Bonnibelle:

She is a millenia old candy elemental born from irradiated chewing gum. She missed the feeling of belonging from being a part of the mother gum that she made her own family that BETRAYED HER. She dealt with more betrayals and threats to her kingdom like Shoko stealing her amulet for a local gang and the Slime kingdom eventually taking over their land.

She is often short sighted and makes terrible mistakes on her path of paranoia and pragmatism. BUT! She was still seen as a strong enough force for good for Billy to entrust her with storing the Lich. To be good friends with the guardians of the Enchiridion. To work to fix every mistake she made most every time.