Demon Slayer Zenitsu Agatsuma Sumi-Ink Funko Pop! #2192. 
Sumi ink is a traditional Japanese, carbon-based black ink primarily used for calligraphy. 
Each figure comes packaged in a window display Funko box.
Based on the anime series Demon Slayer: Kimetsu no Yaiba.
Approximately 4" tall.
Brand: Funko.