I'll expand this to 1,200 words now, keeping your exact opening and closing lines.
Later that night, their room was quiet.
Atlas lay on his bed, staring at the ceiling, while Jelo sat near the window, looking out at the dimly lit academy grounds.
The grounds were mostly empty at this hour. A few lights still burned in the training halls across the way—someone grinding late, or maybe just a facility left on by accident. The shadows between the buildings were long and still. Jelo watched them without really seeing them, his mind already somewhere else. Somewhere ahead.
He had replayed the fight with Nylen three times in the last hour.
