A character type that most often appears in female-oriented media, best described as the human equivalent of a parakeet: small, hyperactive, and annoying yet loveable. The Keet fills the role of a little brother to the cast: he is kind, hyper, inquisitive, talkative, and slightly younger than the main characters (though still too old to justify his behavior). He is also In Touch with His Feminine Side, an attribute that makes him an Audience Surrogate for the female audience of an all-male Cast Full of Pretty Boys.
Guys like this are particularly prevalent in Yaoi, where he's probably an Uke paired with a far larger Tall, Dark, and Handsome brooding type. In other types of works, he's less likely to be a love interest as he is an Audience Surrogate.
Compare Genki Girl. Examples of hyperactive characters that lack the young, feminine little brother aspects should go in Genki Guy or Genki Boy.
Compare Bratty Half-Pint, who has hyperactivity like the Keet's but is much younger.
See also the Otaku Surrogate, his Seinen counterpart.
