Also known as "ink." Aku is both the name of a small cephalopod-like creature whose native world or place of manufacture is lost and the pigmented mucoid substance it produces. The user places the live cephalod over there face and squeezes it to induce the creature to squirt its pigment into their mouth. The ink is a local anesthetic (causing "aku tongue"), but has central nervous system effects similar to cannabis. Long-term use permanently darkens the oral mucosa in idiosyncratic swirling patterns.
Aku
Narcotic