It is a very known fact that CLAMP is a popular group of 4 females. For one thing they are most famous for their beautiful drawings, creativity, and twists in their mangas! CLAMP's works are mostly Shoujo manga (Girls' comics) but they also do Shounen manga (Boys' comics).
Currently CLAMP is very busy, as they are working on CLOVER, X/1999, ANGELIC LAYER, SUKI DAKARA SUKI!, and CARD CAPTOR SAKURA at the same time!!!
Nanase Okawa: the writer and in charge of scripts.
Satsuki Igarashi: in charge of the design development and is also assistant of drawing and illustration.
Apapa Mokona: the main artist, and takes care of the diffulcult layouts, drawings, etc. Amazing though, when the group had first started she was not the lead artist.
Mick Nekoi: in charge of drawing the manga
The Others who left:
Tamayo Akiyama: She was the leading artist in Clamp's first commercial
release 'CLUSTER'. But, throughout
the years, she became heavily influenced by Mokona Appapa's style (still is too). Because of that she left the group leaving Mokona to take over as Clamp's leading artist. Tamayo is now a solo mangaka.
Works: CLUSTER (1991-1995), DERAYD (1993) plublished by Shinkigensha, MOURYOU KIDEN (1993-1994) and CYBER PLANET 1999: HYPER RUN (1995-1997) published by Asuka Comics DX. Current work? For more info and pictures, go here: Tamayo Akiyama Temple, Anime Art's Cluster Image Gallery, Anime Art's Mouryou Kiden Image Gallery
Leeza Sei: The same same thing had happened to her also, she was the artist for 'COMEBINATION'. Leeza Sei is now writing under the name of Iba Takeo. Her style has changed dramatically.