Based on conflicting political, religious and social positions, the English Civil War was fought among the supporters of Parliament and these of King Charles I, identified colloquially as Roundheads and Cavaliers respectively. Lexa bests Roan but kills Nia rather of him, saying Roan the king of Ice Nation. In "Watch the Thrones", Queen Nia chooses her son Roan to struggle Lexa to the demise for the suitable to the throne.