Just like Kyle. Lara, Mia, Carcel, Kelvin, Nine, and the others who were present on the sixth floor also appeared on the first floor after they chose a treasure from the white room.
After arriving at the first floor, instead of being disappointed or sad about the fact that they were not able to advance to the seventh floor. They immediately started hunting monsters and looking around for treasures.
After experiencing so much on the upper floors everyone was clearly stronger than before. That's why the first-floor dangerous monsters were now like ants in their eyes.
Still, there were a lot of powerful 'Boss Monsters' present on the first floor but no one was idiot enough to approach those monsters.
Only two months were left before everyone had to leave the Tower. That's why they wanted to make the most out of the remaining time.
-Unedited.