Wait wait wait is Barou kinda concerned about Nagi??
Notice his change? He says he's not as annoying as before? Did he kind of… care??
Of course, later he treats him with typical King Barou's harshness, but isn't that somehow his motivation speech?
After all, Nagi in a similar way (of course in a much gentler way compared to Barou, but still very cold), he treated Reo and Bachir, which later contributed to the change of these guys:
In both cases, after Nagi's words, both Reo and Bachira found motivation to try even harder.
And now, Barou treated Nagi in a similar way. He communicated in the same way that Nagi had used before. With words which could change a person.
I hope that Barou's words will trigger Nagi and allow him to find the motivation again.