Atlas is a shy and soft-spoken Tatsukoi who currently resides in the fourth layer. He spends most of his time exploring the fourth layer to try to map out areas near outposts while looking for treasure. He often visits the third layer to sell treasures he finds or little sculptures he carved from stone.

His current residence is a dead end of one of the countless tunnels where a collapsed wall reveals a view of the outside. From his home, he gets a beautiful view of the ocean far below and a welcoming breath of fresh air. One of his favorite hobbies is to carve little sculptures out of stones he finds when navigating the fourth layer. He enjoys his current quiet life, but he has the goal to reach the sixth layer, Elysium, one day.