Who are Harlequin and Pierrot?

PIERROT (pē'ərō') [Fr.,=little Peter], character in French pantomime. A buffoon, he wore a loose white tunic with big buttons, balloon sleeves, and white pantaloons. His face was painted white. A creation of Giuseppe Giaratone or Geratoni (fl. 1639-97), Pierrot was introduced to early 19th-century France

HARLEQUIN is A stock character of the commedia dell'arte who occasionally interrupted the action with silly antics. Harlequin first appeared on the English stage in John Day's The Travailes of the Three English Brothers. The San Francisco Mime Troupe is one of the few modern groups to adapt Harlequin to the needs of contemporary satire.