Venus Mantrap

Human Bird Grass (ヒトトリグサ, Hitotorigusa) was a Mysterious Being that attacks a sponsor of the Hero Association with Junior Centipede.

Appearance
Human Bird Grass is a big monster with the appearance of a carnivorous plant.

Personality
His personality is left rather ambiguous, but he seems to be rather impatient and hungers for human flesh.

Hero Hunt Arc
Human Bird Grass emerges from the ground with Junior Centipede at a restaurant. Junior Centipede briefly mentions that he is looking for the sponsor of Hero Association. Before they could grab the sponsor, Metal Bat grabs a coat and engages in a fight with him and his partner.

Monster Raid Arc
Human Bird Grass's corpse is being sat upon by Metal Bat.