Indifferent
Theo became annoyed because he recognized one of them. With the addition of their location and the similarity between all these three people, it was clear the people before him were Laust and his family.
It had been years, so Laust had changed so much to the point he had a hard time recognizing him. Even so, he knew it was him.
Still, he was here to rest in the hotel so that he could sort his thoughts, not to deal with this random problem that somehow appeared in front of him.
Obviously, those three noticed Theo and Felix, who happened to be there.
"What are you two doing? Hurry up and leave this place." Ben Lange shouted while Laust struck his father's sword, stopping him.
"You must have so much confidence to even bother with peasants like them when fighting against me." Their father, Endo Lange, shouted in anger.
He released a huge lightning spark that engulfed Laust.