Species: soot sprite (ghibli)

Susuwatari (Japanese: ススワタリ, 煤渡り; "wandering soot"), also called Makkuro kurosuke (まっくろくろすけ; "makkuro" meaning "pitch black", "kuro" meaning "black" and "-suke" being a common ending for male names), is the name of a fictitious sprite that was devised by Hayao Miyazaki and Studio Ghibli, known from the famous anime-productions My Neighbor Totoro (1988) and Spirited Away (2001) where, in the former, they are identified as "black soots" in early subtitles, as "soot sprites" or "dust bunnies" in the Streamline Pictures English dub, and as "soot gremlins" in the Walt Disney Studios English dubbed version.

https://en.wikipedia.org/wiki/Susuwatari