Author: Uhhhhh- okay, maybe I wasn't too clear. CLAMP characters from things other then CCS to appear:

Akira Iyjuin- cute, genki boy thief from Clamp Campus Detectives and his own side-comic Twenty Mensuo ni Onegi

Akechi Iyjuin- Akira's paternal uncle, so no one really knows of their relation b/c Akira has never known his father. Appears in Tweny Mensuo.

Nokoru Imonayama- mischievous, and a genius he's a blond troublemaker/crime solver in Clamp Campus Detectives, and Duklyon

Suoh Takamura- stern and very, very centered on Nokoru he is from an ancient ninja family and serves as Nokoru's bodyguard in CCD.

Nokoru, Suoh and Akira appear briefly in X/1999, Tsubasa Chronicles, Duklyon, and Twenty Mensuo.

Takeshi- called Takepon by his partner Kentarou Takeshi is a sort of Power Rangers type character in the 2 book series Clamp Campus Defenders Duklyon

Kentaro- is Takeshi's genki and fiery partner who insists on his one dream being a housewife and marrying Takeshi. He even goes so far as to make Takeshi his secretary later in life!

Fai- is a cute and cheerful magician and in the true nature of CLAMP is very mysterious. he'll be fun to write!

Kurogane- is a grumpy swordsman who is sent by his Princess (Tomoyo-chan!) through time and space in order to discover what strength is

I'm debating just how many X/1999 characters will show up but for now expect:

Subaru Sumeragi- an onmyouji (best I can get- he mixes magic and science) and deals with ghosts and possessions.

Seshirou Sakurazuka- is an assassin with an insane fixation on Subaru. Blind in left eye.

Fuuma Monou- is a good guy... when not stating that he is Kamui's twin star and going psychotic on humanity's ass.

Kamui Shirou- is a cute, but angsty individual. At the beginning of X he is a pain in the ass but as time goes on we begin to realize that like most anime characters– he is vastly in need of a hug.

From XXXHolic- luv the manga

Domeki- a stoic boy with the ability to kill ghosts and remarkably pure chi

Watanuki- has the ability to attract a large number of ghosts and spiritual beings and is also .. one word: spastic. Still, he and Domeki have great chemistry!

I might also have people from Legal Drug show up.

(Bangs head on wall too many fandoms!)