Squid

 is an Abnormal informant living in Old City.

He gave Ashley Magnus some useful information on the Cabal shortly after the Old City Sanctuary team first came into contact with them.

Potentially a few months later, John Druitt used Squid to lure Ashley out of the Old City Sanctuary in order to find out where Dr. Helen Magnus currently was located; to save her from Nikola Tesla. Druitt found Squid and forced him to set up a morning meeting with Ashley. He then took Squids cloths, at least his jacket and glasses, to impersonate Squid in order to fool Ashley when she arrived at the meeting location.

to be added

Years later, he gave the Sanctuary team helpful information about the abduction of Dr. Will Zimmerman and his girlfriend, Abby Corrigan.