Themodir was born in Gondolin in 497th year of the First age to the house of Bar-en-Egalmuth. He was one of few lucky elves that could made out alive.

Through their ways to Brithombar and Eglarest he never had a happy childhood. He had few friends during this time except Anglachelm who was a member of higher nobility than he was in the city but they become friends ever after. Grey elves of Eglarest cared for them both. The two friends here formed a house over their memories and grieves calling it Vanimar. The missed home (also the fair ones respectively) For several decades they were idle. But Themodir learned star-lore from mariners after a fine grasp of navigation and there he wore the first Mariner hauberk there, which would later become a fashion in his house of Vanimar. 

In Brithombar his Noldor blood urged him to return to the arts of Metalworking but he never wielded a blade until Lord of the Havens bid him so. Cirdan himself was aware of the boy's hatred and uncontrollable fervour, which was added to the massive grief of his cities loss. Years later, with reluctance Cirdan allowed him to enlist to haven sentinels but years later he would say that he was sorry about this decision. After this part on Themodir went out of control in every confrontation against orcs, which he hates with passion for their part in the sack of Egalmuth district of Gondolin. Because of that, he never got tired in patrols and many elves of havens fell into grief because of his inner, inexhaustible and inextinguishable flame. Until their houses of Vanimar extended in size and influence Themodir served to Cirdan and recovered his thoughts.

After Vanimar become a true house in every meaning of the word, he did not take part in anything of its policies and politics, but sought only to douse his inner flame. Joined to Veryacano's much famed Order of Hammer and beaten its hound in a fair combat trial. Earning his warrior ranks. 

But fate was about to bring more flames to his soul, yet not all was bad. Rumor it is that he is betrothed to an elven Lady of fame called Manadhlaer and seeking to reunite with her. Feeling always torn between his obligations and love.