He's been looking forward, keeping eyes ahead for rough terrain or further attacks, so when he hears a language that is both intelligible and entirely not come out of Nita's mouth, he visibly starts and whips around to look at her.

And he listens. And he thinks.

Between Xander feeling emotion from the train and Nita being able to speak to it, the train is very much alive, likely sentient, and possibly sapient. Incredible, and the perfect pair of talents to be able to gather the data for it.

His thoughts take a turn as he remembers a conversation with Gen, and he cannot help but ask. "Can it be taught?"