A fanart of Piko. Source
Female (most likely)
Piko (the name may be incorrect) is the mascot/protagonist of the online fangame Dream Continuation. (ゆめのつづき。).
Piko has short grey-black hair with a standing strand and a white and red flower hairpin. She wears a green scarf, a blue shirt with light blue sleeves and a rectangular pattern similar to Madotsuki's; a blue skirt and orange shoes.
Almost everything about this character is unknown, probably due to the game being almost unknown of for years.