Spoiler Alert: This article or section contains details about plotlines not covered in the anime. Do not proceed unless you wish to be spoiled.
Ronbaru (ロンバール,Ronbāru?) is the main settlement of the 27th Floor of Aincrad. The city has a night elf theme. Because of the lack of important facilities, the front line players spent only a short while in this town in the original Aincrad.
The town, which is carved out of a mountain, is located within a circular valley close to a ravine and looks as if it was carved out of rock, with an orange light that has the calming effect of a sole campfire on a frigid night shining over it. Multiple narrow alleys and stairs complicatedly criss-cross throughout the town, the alleys extending radially out of the circular central plaza in the center of the town. A mild pot roast fragrance can be felt within the town. The town also has stone floors, bridges and tunnels. Fitting the setting of a night elf city, there are no large buildings within it, with only a small workshop, a shop and an inn made out of cyan stone tightly connected together. Under the orange light, the city has a fantasy-like beauty and the liveliness of a night festival.
In the New Aincrad, a Save Crystal is located in a dome-shaped building opposite of the city square.
On January 7, 2026, Yuuki brought Asuna to an inn in this city to meet the other members of the Sleeping Knights guild and to ask for her help in defeating the 27thFloor Boss. They all met again at the same inn at 13:00 the next day on January 8 to decide on a basic formation, before setting off towards the Labyrinth. After their first failed attempt at defeating the boss, the group respawned at the Save Crystal located within Ronbaru, but instead of resting at inn before their second attempt, Asuna gathered them all at the corner of the room they respawned in, telling them that they needed to hurriedly return to the boss room before a clearer guild reached it. She quickly told them her new strategy and they again set off for the Labyrinth. After defeating the boss on the second attempt, they returned to Ronbaru via a Teleport Gate on the 28th Floor's main town and went to the central marketplace of Ronbaru to buy food and drinks for the afterparty.