Kosho
Kosho is the Dragon Exterminators' tank. His job is to draw the attention of whatever nasty thing the party is fighting and take the major hits so they can use their talents to take out the nasty thing. He is unrelenting, destructive, strong as all hell, probably 6'10" and all frickin' muscle.
Kosho is in his 40's. He's been a fighter all his life, as it was obvious from a young age he was going to be a big boy. He is a man of few words and carries a heavy mental burden due to a fight many years ago in which his entire village was wiped out by green and blue dragons while he (with the help of the Great Mage of the South, who happened to be passing through at the time) took down the red dragon who was leading them. His family and fiancee were among the dead, which all but broke him for a time. This is part of why he ignores Akane's advances and still treats her like the child she was when she first joined the party.
He is the only member of the party who has ever been to the Demon Lord's castle. He is a master of the sword, but his weapon of preference is the large mace or hammer -- because, basically, he likes to beat the living crap out of his enemies.