Bruno considered the situation and looked unhappy. He wasn't too upset about Gretel being sent away because she was a difficult and troublesome person. However, he found it somewhat unfair that everyone else had to go along with her as well. His feelings showed a mix of indifference towards Gretel’s departure and concern about the collective experience.
"Bruno thought about this and frowned. He wasn't particularly bothered if Gretel was being sent away because she was a Hopeless Case and caused nothing but trouble for him. But it seemed a little unfair that they all had to go with her."