I tried not to make too many characters, so it's different from the actual books. But here they are:

ShadowClan:

Leader: Fernstar- Grey she-cat with fern-green eyes that turn teal the further from the pupil

Deputy: Frogscar- White tom with grey paws and tail

Medicine Cat: Tallmeadow- Black she-cat with grey stripe

Warriors: 

Thinfur- Thin-furred black tom with yellow eyes

Treepool- Mottled brown tom with amber eyes

Grassfang- White tom with green eyes and a lean muzzle

Queens:  

Badgerleap- Bright ginger she-cat with amber eyes

Yowltail- Sandy yellow, lean she-cat with amber eyes

ThunderClan:

Leader: Strikestar- Ginger tom with dark amber eyes

Deputy: Boltfur- Ginger she-cat with pale blue eyes

Medicine Cat: Snarlfang- Dark grey tom with unfocused amber eyes

Warriors: 

Sparktail- Mottled ginger she-cat with white stripes around tail

Mousesong- Light grey tom with amber eyes

Voleecho- Dark grey tom with amber eyes

Heatpelt- Red-brown tabby she-cat with green eyes

Sapnose- Brown tom with copper eyes and torn tail

Hardclaw- Black tom with icy blue eyes

Thorntail- Spiky-furred white tom with sharp green eyes

Apprentices: 

Stonepaw- Grey tom with blue eyes

Spotpaw- Yellow tom with amber eyes

Bushpaw- Thick-furred grey tom with hooked claws and shiny amber eyes

Slatepaw- Dappled grey and white she-cat

Queens: 

Flaketail- Thick-furred brown she-cat

Glancetail- Dark ginger she-cat with odd blinking habit

WindClan:

Leader: Quickstar- Light grey tom with blue eyes

Deputy: Ravenfur- Skinny black she-cat with short fur and narrow muzzle

Medicine Cat: Beechleap- Mottled brown tom

Warriors: 

Fangleap- Grey tom with half-blind eye

Stripeflight- Striped grey tabby tom

Comfreytail- White she-cat

Amberflight- Amber she-cat with amber eyes

Apprentices: 

Speedpaw- Grey tabby she-cat with long tail and blue eyes

Dewpaw- Pale yellow tom

Queens: 

Litheleg- Yellow she-cat

RiverClan:

Leader: Coralstar- Pinkish she-cat with yellow eyes

Deputy: Fishnose- White and grey tom with blue eyes

Medicine Cat: Finspot- Grey tom with single black spot

Warriors:

Mosstail- Moss-green eyed silver-grey tom

Deeppool- Tabby she-cat with deep blue eyes like pools

Troutfin- Weed-green-eyed silver-grey she-cat

Narrowfang- Thick-furred grey tom

Stemstorm- Mottled silver tom

Apprentices:

Lakepaw-Sky-blue eyed grey she-cat

Streampaw- Sky-blue eyed black she-cat

Slitherpaw- Smooth-furred silver she-cat

Shortpaw- Sleek ginger tom

Arrowpaw- Dark-blue eyed grey tom

Queens: 

Shellstripe- Dappled white she-cat

SkyClan: 

Leader: Rainstar- Grey tom

Deputy: Stonefall- Green-eyed tabby she-cat

Medicine Cat: Cloudstorm- Beautiful dappled white she-cat with lilac eyes

Warriors: 

Sparrownose- Ginger-and-white tom with amber eyes and scarred muzzle

Grassleap- Tabby tom with green eyes

Tenderleaf- Tortoiseshell she-cat

Apprentices: 

Soilpaw- Brown tom

Longpaw- Black she-cat

Molepaw- Dark grey tabby she-cat

Featherpaw- Mottled grey tom

Queens: 

Shardstorm- Grey she-cat