You have a fine premise, but the introduction seems rushed and forced. You should introduce everyone slowly and with the flow of the story. For example, you could introduce the main character's name by having it called by his grandparents, then having him inform the read that his name is Embre(as he would have been called by one of his grandparents). Trust me, you can't make a deep and intelligent story without taking your time to introduce and develop the characters, as well as explain their backgrounds.

Now, rather than the flame birth mark, which is a well used plot mechanic, you could instead have him have been burned in the fire, and include with that injury some sort of disability related to it, such as a burn that damaged nerves in his arm/leg/etc making it weak(just an example). Many stories have their main characters injured/disabled either from the start of the story or some point along the way as a means of moving the story along, as well as a basis for allowing emotional and personal development as the characters learns to cope with the injury.

Anyway, that's my input. Take it into account at your leisure.