Don't worry the dragon is a child in both dragon and human ages were good
Thank god!!
Considering she's 200 yo and the age of adulthood for her species appear to be 300 + taking the 20 yo legal adult age from Korea as reference = she may be around 13 yo in human years
(I haven't read the novel so this is just a theory, not canon!)
Hopefully that's true because I love their relationship as it is right now kind of like an older brother and his bratty little sister ahaha
I love this manhwa sm omg but please please don't pair sejun with the dragon