Ismark is the son of Barovia’s burgomaster, Kolyan Indirovich. He has lived most of his life in his father’s shadow, leading the villagers of Barovia to refer to him as “Ismark the Lesser”. His young life has been spent in training in the hopes of freeing his people from their ruler, the "devil Strahd". In particular, Ismark is concerned for his adopted sister, Ireena Kolyana, who Strahd is stalking. For the past few weeks the undead have attacked the burgomaster’s house on an almost nightly basis. Ismark isn’t certain what the purpose of these attacks is, except that it has something to do with Ireena and that the undead are under Strahd’s control. The constant stress of these assaults led to Ismark’s father’s death some three days ago, and Ismark is now seeking the aid of anyone who would stand with him against Strahd.
Ismark was captured by Strahd's agents and killed in the climatic final battle between Companions and his remaining minions. The companions used magic to return the new burgomaster to life and ultimately thwarted Strahds feeble attempt at revenege against Ireena.