"So, Bo has only killed or try to kill humans twice. And twice, it was to protect Lauren. First it was Nadia/Garuda who tried to kill Lauren, and then it was the boy in 3x10, who tried to kill Lauren for his girlfriend. (do we count Massimo?) She’s not a murderer, but to protect Lauren, Bo just react. Her instinct, her fear to lose Lauren… There’s no more good or bad, no more dark or light. There’s just a world with or without Lauren. And for Bo, a world without Lauren, it’s a world that has nothing to come back for."
Bo - “You’re gone, there’s nothing to come back for.”