|Japanese Name||Rangeborugu (ランゲボルグ)|
|Voice Actor||Yūji Kishi|
- "He calls himself "The Brain". Originally from Norgard, but he left when Vaynard took over the throne. He didn't think Vaynard had the ability to make a good King. He always bothers Queen Lyonesse with suggestions that have no meaning."
When a country captures Leonia's last castle, Langueborg will join that country.
Langueborg has fair skin, light green eyes, and short, light brown hair.