Taiyou 
btw
Houkiboshi = comet
and Houkiboshi spits out comets
Seiun = nebula
and Nebulas are made of space dust [remains of stars and stuff] when gravity pulls it togeather a star is born so
Seiun start as hatchlings
Taiyou = sun
and Taiyou breath fire and are the color of the sun
actually all the species breathe fire but Taiyou have an especially hot one
links to previous
