Remo only stayed in Luke's apartment for three nights, and for those days and nights, he somehow got used to Cosette and Luke's usual banter, their routine, and how they do their housework seriously. Maxen and Cosette didn't stay over at the apartment after their first night, but they would leave late.
So, Luke and Remo got some little time to bond or talk. It was only casual talk before they sleep, and Remo, somehow, saw Luke in a different light. Luke might be a little childish around Cosette, and overprotective of Maxen because it seemed Luke had viewed Cosette as a witch who was preying upon Maxen.
But whenever Luke was alone, he got this solemn look on his face. He didn't look anything silly, or anything immature at all. What surprised Remo the most was once Cosette and Maxen leave, Luke would mostly read stuff until he would fall asleep.
