After the passing away of King Rama IV, Royal Princess Sunandha Kumariratana at that time, only 8 years old had changed their dignity from “Royal Princess” to “Her Royal Highness Princess Sunandha Kumariratana" and presented herself as the consort of King Rama IV when the age of 15 – 16 together with her two younger sisters, H.R.H. Princess Savang Vadhana (Her Royal Highness Princess Sri Savarindira Borom Ratchathewi Phra Phan Vassa Ayika) and H.R.H. Princess Saovabha Phongsri (Her Royal Highness Princess Sri Bajarindra).

H.R.H. Princess Sunandha Kumariratana, her character is strong but decisive. Including courtesy and courteous manner make her respected by royalty, courtiers and was very close to his royal consort.