 Indonesia is more interested in defining itself as Indonesian by trying to develop national character building, to define themselves as pluralist nation encapsulated in Bhinneka Tunggal Ika (unity in diversity) under Pancasila as national ideology with territorial claim only spanned from Sabang in Aceh to Merauke in Papua.As the largest nation in Southeast Asia, Indonesia seems to be satisfied on channelling its regional ambition through assuming leadership role among ASEAN countries.On the other side, Malaysia was struggling on national building and facing problems regarding the national format alternatives; between leftist republic fighter and rightist traditional royalist.