Lon'qu, known as Ronkuu in Japan, is a character from Tokyo Mirage Sessions ♯FE.
is a character from . A resident of Regna Ferox on the continent of Ylisse, he is a native of Chon'sin on the continent of Valm, from which he fled in shame after an incident in which his friend Ke'ri was killed and her parents blamed him for her death. The event also led him to develop a phobia of women from the thought that the same fate might befall other women who grow close to him.
After arriving in Regna Ferox, Lon'qu's swordsmanship was noticed by Basilio, one of the two Khans of Ferox. The decision over which Khan will rule the country is determined by a tournament in which each Khan's chosen champions battle, and the winning champion's Khan becomes ruler until the succeeding tournament. Lon'qu's skill led him to win the tournaments for several years, keeping Basilio in power. However, when a warrior disguised as the long-deceased Hero-King Marth appears, Lon'qu meets his match and loses for the first time due to an uncharacteristic hesitation. The reason for his hesitation in the match was because he realized that "Marth" was a , causing his phobia to trigger.
Lon'qu joins Chrom's forces when Ferox pledges its support to Ylisse in the war with Plegia and remains among Chrom's allies for the duration of the game.
Tokyo Mirage Sessions ♯FE
Yashiro lands a part on Masqueraider as the main villain, but can't reconcile the fact that he must fight someone yet also respect them. In response to Yashiro's uncertainty, his Mirage partner Navarre claims there is an opponent Yashiro can revere in the Idolasphere.
Venturing into the Idolasphere, Itsuki and the others find the soul of Yashiro's father, Chikaomi. Lon'qu then enters and says he found Chikaomi's soul five years ago, after the Mass Disappearance, and took it for himself.
Itsuki and the others fight Lon'qu in order to free Chikaomi's soul. After the battle, however, it's revealed that Lon'qu and Chikaomi were merely acting. Chikaomi learned that Yashiro had been troubled, and had worked with Navarre to set the entire thing up.
Lon'qu saved Chikaomi's soul five years ago, and the two have been working together ever since. Chikaomi lingered as a spirit of regret out of concern for Yashiro. Due to the ordeal, Yashiro now understands the type of respect that can bloom on the battlefield. His regret now lifted, Chikaomi and Lon'qu disappear.