She tells him not to make such promises, but there's a bubble of emotion - something defiant, a disagreement, but nothing as heightened as before. Tidus knows this isn't the time, but he's not dissuaded; only, he'll keep it locked up, focus on what's important now.

Like getting Danny back, safely. Letting Lioriley speak, and some emotion does spring up to the remark - the equivalent of a You bet! that only grows to Danny's input.

He is so ready to get them both back to the train, safe and sound. (Did Lioriley need such an emotionally expressive person in her head? Unfortunately, such is her fate.)