Ink of Squid Pro Quo

Well, well, well...guess which mysterious item decided to show its face? Back when Problem Sleuth checked the FAQ for help with the diplomacy situation, it recommended sharpening the Tectrix of the Arbitor and obtaining the Ink of Squid Pro Quo if you were going to legitimately complete the negotiation. Now, in the speakeasy, the hatless man acquires the Ink before going to the dollhouse and ending up with DMMK. It is likely that one of our main characters (or female alter egos) will end up with this ink.

(Who else noticed the pun?)