Baldrek's father was a miner. Baldrek's grandfather was a miner. His family has had a story with mines for centuries. Of course, he ended up working in the mine. But he found more than just ore and gas.
He discovered he felt good and safe hidden in the depths, among the corridors and in dim light or just plain darkness. The absence of light, usually fearful and dangerous to others, was comforting to him, and he was proud to be able to help his comrades in the mine thanks to the special connection he has developed with the dusky underground halls.
Eventually, this connection started to materialize. He experimented some changes and discovered special gifts that he was bestowed upon. He embraced the church of Moradin with devotion, following the commandments of protecting his peers and giving them comfort. Where others followed the forge, he followed the earth from where to get the ore. Where others followed the fire, he followed the night time bringing rest and the dark bringing cover. He had a dream of using his gifts for the good of his community, and entered the cult as an acolyte.
Opportunity would arise soon after being ordained. A new settlement was to be found, an expedition was prepared, and some miners were to be sent, many of them well known to him. He went as a volunteer, asking for special permission to go on the mission.
Baldrek is not a very talkative guy, since he's spent much time alone in the dark mine tunnels back in his homeland. Saying this when you talk about a Dwarf is saying a lot, of course. Still, his background in the mine has taught him companionship, and he knows how to play for the team - even if he sometimes claims his five minutes of glory.