Controls the maintenance shaft network threading through all of Gorodskie Ekho. Reports to no faction. Knows more about the city's physical infrastructure than anyone alive.
The maintenance shaft network connecting Gorodskie Ekho's levels is Kasim Adler's domain. He inherited it from the previous operator, who inherited it from the one before. The shafts predate the city's current structure. So does Kasim's family's claim to them.
He reports to no faction, contracts to all of them when the price is right, and has declined three serious recruitment attempts. The information advantage of knowing every passage between every level of a twelve-million-person city is worth more than any faction contract.