Dhruva - Epic Characters of Puranas

Dhruva, a bright star right in the middle of a large constellation (Dhruva mandala), was a great devotee of Lord Narayana at the tender age of five. Son of King Uttanapada and Queen Suneethi, he left home and went to the forest in search of the Lord after his step-mother forbade him from sitting on his father's lap and told him to make himself worthy of his father's love. Narada met him on the way and tried to persuade the child to return home but Dhruva was bent upon achieving what his father and grandfather had not.
He performed very severe penance and meditated on the Dwadashakshara  manthra into which Narada had initiated him. The young devotee not only got the Lord's darshan but also experienced His presence within himself. After this, the Lord granted him immortal status but not until he had performed his duties  to his kingdom and his people. Dhruva went on to becoming the emperor after his father became too old for state duties.
He avenged the death of his brother at the hands of a Yaksha by killing thousands of yakshas. Only his grandfather, Swayambhu Manu, was able to convince him to stop the bloodshed. This pleased Kubera as Dhruva had renounced anger and hatred. By and by, Dhruva handed over the reins of his kingdom to his son and sat in deep meditation of Lord SriHari.