Prince Salamandes- The fourth son of Grandienne, demon of fire calamnity. He started out pretty cute as Drop but he became a monster thanks to Zylpheeza's demise and him inheriting the star gem.
Ryuon- He's a man with dragon genes in him from Lemuria. One of his monsters Talong was based on a Chinese dragon and a master of Feng Shui. His faction in Boukenger was also dragon-based.
Long- He's actually a five headed dragon with all five heads working in unison. The dragon is the fifth in the Chinese zodiac too.