What she is: a demon (irony)
If demon, what kind?: wolf
Her master is an OC (which suddenly gave me a book idea *everyone groans* oh shush!)

Onto the little skit thing:

Angel: *in a silver tail coat with black dress pants and black boots and has black gloves on* *has a white dress shirt underneath the tail coat and her hair is in a ponytail, but her bangs cover her left eye* M'lady? *knocks on a door*
??: come in
Angel: *smiles, opens the door, and brings in a cart* you can thank Lily for making breakfast today, Miss Faith.
Faith: *smiles and puts her gloves on, covering the mark that proves her contract with Angel thats on her hand, and grabs her cup of tea* remind me to thank her.
Angel: M'lady please do remember we have a meeting with someone later.
Faith: ..... And just when I thought I could have a break TuT'
Angel: *smiles and bows* I'll leave you to eat. Call me if you need me

~later~
Angel: *skipping along beside Faith*
Faith: -w-' really Angel?
Angel: im supposed to look innocent ^_^
Faith: since when?
Angel: *shrugs*
Sebastian: *walking around with Ciel*
Angel: waaaiiittt...
Faith: hm?
Angel: I smell.... A cat?
*a sneeze can be heard and then yelling*
Faith: -.-" we dont have time for this
Ciel: *yelling at Sebastian for smuggling a cat when he knows Ciel is allergic* AND-
Sebastian: young master, I do believe that is the girl we are supposed to be meeting *points at Faith*
Ciel: .....
Angel: hey Faith? Isnt that Ciel?
Faith: T-T I guess so

Angel on  a daily basis:
Angel: *smiling, giggling, and skipping around like a child*
When a dude seems like he is about to kidnap Faith:
Angel: I suggest you dont do that ^~^
When a dude actually kidnaps Faith:
Angel: I told you not too~
Faith: I told you that you wont last long.
Dude: SHUT IT
~later~
Dude: *ded*
Angel: *not a single scratch*
Faith: I tried to tell him.

Angel annoying Sebby:
Sebastian: I really wish they would hurry up and end that meeting
Angel: awwww! But we're having so much fun! *giggles*
Sebastian: you are by annoying me, I on the other hand can take your puny mortal soul at any given moment
Angel: puny.... Mortal.... Soul? *bursts out laughing and her child-like aura disappears* you have me mistaken sir! I have a contract with M'lady as you do with Mr. Phantomhive!
Sebastian: .... Well shi-
Angel: nah ah ah. Thats very bad Sebby.
Sebastian: ......
Faith: Angel! Lets go!
Angel: yes Ma'am! *skips off happily*
Sebastian: CIIIEEEEELLLL WE HAVE A PROBLEEEEEMMMMMM
ciel: *grumbling* WHAT IS IT NOW SEBASTIAN?!
Faith and Angel: *leave laughing*