Vault of the Spring Maiden

Hazel Rainart: He didn't tell you my tale, did he, boy? I thought you looked familiar, to think that evil was inside you when our paths first crossed. Your blood won't be on my hands, it'll be on his.

[Qrow jumps into the fray and duals with Hazel]

Oscar Pine: What was he talking about?

Hazel Rainart: Tell him, Ozpin! Tell him how you KILLED HER!

Oscar Pine: Her?

Professor Ozpin: [v.o] Gretchen Rainart was Hazel's sister. Despite her brother's wishes, she enrolled at Beacon Academy to become a Huntress and tragically lost her life on a training mission. Hazel holds me responsible. Please, let me fight. I know Hazel. He's wounded in a way that cannot be healed.

Hazel Rainart: You know now! You can forgive me for what I'm about to do.

Oscar Pine: Did she know? Did she know the risk of being a Huntress?

Hazel Rainart: She was only a child! She wasn't ready!

Oscar Pine: She made a choice! A choice to put others before herself! So do I.

Hazel Rainart: Then you've chosen death!