Duo Lon (Chinese: 堕瓏; Pinyin: Duòlóng; Japanese: デュオロンDyuoron) is a video game character who made his first appearance in The King of Fighters 2003 as a member of the year's Hero Team. He is the first male character from The Flying Brigands to resemble a "handsome" man and the first to sport an ornate design. His overall look was based on the anime title character Vampire Hunter D. His official nickname is The Silent Assassin.
He is a member of the assassin group, the Flying Brigands, -orHizoku (飛賊, Hizoku) Clan in Japanese- and the half-brother to Xiao Lon. As the son of the clan's leader, he is known as a "prince" and is the eldest of Ron's sons. Like his brothers, he left the village in his youth to train and perfect his art.
After Ron's betrayal, his reputation with the remaining members declined as he was labeled "that traitor's son". Hoping to hunt down the clan's traitor, he partakes in several jobs as an assassin. As he does so, Ash Crimson mysteriously appears before him and makes his acquaintance. Through Ash, Duo Lon also meets Shen Woo. Liking their company enough to be friendly with them, he agrees to enter the 2003 tournament with them but disappears when he senses Ron's presence. After discovering Ash's true objectives, he teams up with Elisabeth Blanctorche and Benimaru Nikaido to punish his former teammate.
Although he is still dedicated in his mission to hunt Ron, he is curious about Ash's intentions and respectfully parts ways with Benimaru. He meets up with Shen Woo to try to discover anything regarding their former teammate's whereabouts. At a dead end with his search, he remembers that Elisabeth had some connection with Ash and they work together to find her. In their team's ending, both he and Shen Woo respectively give Elisabeth time to mourn over Ash's "death".
In spite of being a Hizoku assassin, Duo Lon is calm and has a good heart. He also has a strict sense of justice, as shown when he turned on Ash and by his mission to kill his own father. He feels estranged from his father and often does not address him as his parent, preferring to call him "that man" or "Ron". Although he considers Luanhis good friend from childhood, their relationship became strained with Ron's betrayal.
- Necromancy - Duo Lon has powers related to death.
- Necromantic Teleport - Duo Lon can decompose his own body and recompose it somewhere else.
- Necromantic Limb Travel - Duo Lon can pierce the ground with his legs and make them appear somewhere else.
- Stretch arms - Duo Lon can stretch his arms to unknown lengths.
- Summon Spirit - Duo Lon can summon spirits from the netherworld.
- Spirit Bomb - Duo Lon can create a projectile made of spirits.
- Shadow - Duo Lon can make a shadow of himself which attacks as he does.
- Translocation - Duo Lon can move quickly to somewhere nearby.
His fighting style is probably a different Kung Fu style, mostly likely Snake style which can be seen in his Sutemi Juuryuu/Apprentice Dragon of Submission technique. It also emphasizes his necromantic abilities in moves like his Benpatsuken (Pigtail Fist) technique, and Juon Shikon (Dead Soul of the Crused Grudge). It is unknown if his foot can actually phase through surfaces, or if it is just an apparition.
In KOF XII and XIII his moveset is drasticaly reduced, consisting mostly of limb stretching abilities and teleporting. The inputs for most of his special moves is also unorthodox for KOF. He is the only member of the KOF 2003 Hero team to not retain his LDM.
- Splendid Evil - The King of Fighters 2003
- Queen - The King of Fighters XI
- Each Promise - The King of Fighters XIII
- The King of Fighters 2003
- The King of Fighters XI
- The King of Fighters XII
- The King of Fighters XIII
- Days of Memories (fourth title) - cameo with Ash
- The King of Fighters '94: Rebout - background cameo