BB Hood has a split personality, on one side, she is sweet gentle, with a high pitched, cheery young girls voice.

And the other side is a ruthless psychopath with a raspy and menacing voice. 

Though she is European, most like British, I feel she would suit an American accent over a British one, use whichever you are most comfortable with!

Baby Bonnie Hood is a thrill seeker who enjoys the hunt, she will search out for many creatures to hunt, even to the point of doing it for the sport of the hunt then the pursuit for money. Because of this, she is mainly described as an antithesis to Donovan. She hunts solely for the sport, while Donovan hunts to find meaning in his existence. As a profit-seeking Darkhunter, she intentionally pretends to act like a defenseless girl as a way to trick her prey in order for them to get closer to her, and many of her hunting skills are stabbing her opponents with weapons such as knives and using guns for shooting.