Melaki no Kuu

Melaki no Kuu (メラキのクウ), or Meraki Kuu, is the name Faputa uses for a mineral found intermingled in structures in the Abyss.

Description
In combination with animal fat and Faputa's urine it creates a glue-like paste which Faputa uses for adhesion and writing. This paste doesn't dry out when it comes into contact with the air but rather hardens when exposed to light carried by The Force Field.

Melaki no Kuu and Faputa's urine react to turn dark red, but if the mineral can't be found blood can be used as substitute. Whether this mineral can also be found outside the Abyss is not known.