Lelouch (not really the heir though considering how many possible heirs there are...) - Code Geass
Ichigo (maybe -- he is the missing heir of a captain...) - Bleach
Tenchi - Tenchi Muyo
Tavi of Calderon - Codex Alera
Kyo - Samurai Deeper Kyo
Ichigo (maybe -- he is the missing heir of a captain...) - Bleach
Tenchi - Tenchi Muyo
Tavi of Calderon - Codex Alera
Kyo - Samurai Deeper Kyo