Ahsoka Tano: Why is he so upset?

Obi-Wan Kenobi: Anakin has never talked about his past, has he?

Ahsoka Tano: Only to tell me he won't talk about it.

Obi-Wan Kenobi: As a child, Anakin and his mother were sold into slavery by the Hutt clans.

Ahsoka Tano: Oh. And these Zygerrians, they're slavers?

Obi-Wan Kenobi: Anakin has struggled to put his past behind him.

Ahsoka Tano: Don't worry, I'll keep an eye on him.

Obi-Wan Kenobi: Yes, make sure you do.