In general, the Iron Marshmallows are mostly children. Smiley is one of their adult associates.
Smiley is one of those unlikely heroes with a sorted past. He used to traffic in dead things, including medical cadavers. Being well known in the industry as a grade-A scrounge with "connections," costumers seldom double checked his supply chain.
His primary connection with the Iron Marshmallows is Sister Asp, his "adoptive niece." (They're not the most trusting group, particularly of adults.)
- Sister Asp is more of a chimera than Frankenstein's monster in that she's not entirely human. Her human part was Smiley's last acquisition. She still retains many more "old" memories than Smiley thinks that she does.