[Congratulations on finding the one subject Rey is genuinely excited to talk about.]

Droid. It's an AA unit — the line just before the BB series, which BB-8 was. She was completely totaled on Takodana. The Resistance mechanic let me take her because he was just going to use her for scrap. But I've checked her core and it should still work. If I can get the right parts, I should be able to bring her back to life.