The Gate Season 2 poster, featuring Itami, Rory, Lelei, and Tuka standing on the rim of Roldom Canyon.
Roldom Canyon, also translated as Roldom Valley, is a large canyon located on slopes of the Tuba Mountains, created by an unspecified river. The canyon itself is northeast-southwest trending, with steep walls and surrounding terrain making it accessible only by foot. While it is technically located within the borders of Elbe, the canyon's rugged, inaccessible nature means that it is actually controlled by a de-facto independent band of dark elves.
Plot
After the Flame Dragon Attack on Schwarz Forest, the dark elves were forced to flee to the relative safety of a cave in the canyon. It was from this point that the sent Yao Ro Dushi to gain the aid of the Japan Self-Defense Forces in slaying the creature. Yao successful only in gaining the help of Youji Itami, who travels to the canyon along with Tuka Luna Marceau, Rory Mercury, and Lelei La Lalena. After a short engagement with the dragon, in which Itami succeeds in driving it off with a Panzerfaust-3 rocket, Itami gives the dark elves some basic training in using the rocket launchers, before traveling to Mount Tube, the location of the dragon's nest. After an engagement which cost the lives of all of the dark elves except for Yao, the dragon slain, and two if its offspring were killed by the JSDF upon their arrival.