Walt, also known as Heisenberg, had a complex relationship with Jesse's girlfriends. While he never directly harmed any of them physically, he was responsible for their suffering in various ways.
- Jane Margolis: Walt witnessed Jane overdose on heroin while in Jesse's apartment but chose not to save her, ultimately leading to her death. He later justified his inaction by saying it was necessary to protect Jesse from the devastating consequences of Jane's drug addiction.
- Brock Cantillo: Walt poisoned Brock, Jesse's young son, with a poisonous plant called ricin to manipulate Jesse into cooperating with him. He later confessed to the poisoning, but only after Jesse had suffered immense anguish and guilt.
- Andrea Cantillo: Walt indirectly played a role in Andrea's death. He orchestrated a plan to have her and Jesse killed, believing it was necessary to eliminate loose ends. This plan backfired, resulting in Andrea's death.
While Walt's actions were driven by his own self-preservation and desire to protect his drug empire, they ultimately led to the destruction of Jesse's life. He lost the love of his life, his son, and the woman he was trying to build a life with, all due to Walt's actions.
