I thought to add a real family tree rather than my silly list.

[hider=Royal Tree][img]http://i.imgur.com/X9CFk2b.png[/img]

RED: Marriage Relation
GREEN: Blood Relation

Full Royal Family:
-Emperor: Veras Kesalin, 60 Years of age. (Emperor, Male)
-Empress: Pena Kesalin, 56 Years of age. (Empress, Female)
-Heir Apparent: Prince Erian Kesalin, 32 Years of age. (First child of Veras Kesalin, Male)
-Second in Line: Princess Velia Kesalin, 28 Years of age. (Second child of Veras Kesalin, Female)
-Third in Line: Prince Ramos Kesalin, 21 Years of age. (Third child of Veras Kesalin, Male)
-Fourth in Line: Princess Ellai Kesalin, 18 Years of age. (Fourth child of Veras Kesalin, Female)
-Fifth in Line: Princess Meria Kesalin, 8 Years of age. (First child of Erian Kesalin, Female)
-Sixth in Line: Prince Faros Kesalin, 4 Years of age. (Second child of Erian Kesalin, Male)
-Seventh in Line: Duke Merun Kesalin, 60 Years of age. (Brother to Veras Kesalin, Male)
-Eighth in Line: Lady Aria Kesalin, 27 Years of age. (First child of Merun Kesalin, Female)
[/hider]

That covers everyone who is a direct heir.