Well, I'm not published yet...but I have introduced a character in book one, chapter one who has VERY brief page-time. She won't really play any major role in anything until book two, however.
The trick is, of course, not to make the character seem like they are there for no reason. Don't try to develop them TOO much, because the reader might wonder why they don't show up again for the rest. Instead, develop them enough to meet the needs of book one. Make that character realistic, but don't make the reader expect to see more of them.
Here is the page-time you get for this character.
First, shortly into chapter 1:
Maybe she could pretend she hadn’t heard. Red was waiting just outside the doorway. Only, Rashae Geller was hovering by the door—along with her posse of stuck up friends. Rashae sneered at her, and Alex swallowed, trying not to look her in the eye. Alex turned around.
Then, later in chapter 1:
Then she stopped a few doors down from her own room. Rashae Geller’s door was open. She didn’t want to deal with Rashae Geller right now. She didn’t want to deal with Rashae Geller, ever.
Tip-toeing, Alex peered in, hoping for an empty room. No such luck. Rashae was standing there holding a tube of lip gloss, her reflection staring back at Alex.
“What?” Rashae said. Her mess of tight black curls looked like they were about to spring out and attack at any moment. “You got a problem?”
Alex pulled back, trying to look natural or confident or anything except how she actually felt.
“I said, you got a problem?”
Alex shook her head, biting at the dead skin on her own dry, cracked lips. Self-consciously, she grabbed at her long, sandy hair, trying to comb the tangles out with her fingers.
“What’s the matter? You still miss your mommy?”
“You gonna go play dollies with your little sister?” Rashae laughed, leaned in toward the mirror and swiped some orange goop across her lip. She smooshed her lips together, puckered, then rolled her eyes at Alex. “Are you just gonna stare at me like that, or did you want some fashion advice?”
Alex’s insides turned to ice. “No. I just—”
“—go on, then, before you break my mirror with that face of yours.”
And finally, in chapter 3:
Alex turned a half second too late as Red slammed into her. Her book went flying, and she landed in Rashae Geller’s pudding.
“Get your backside out of my pudding, creep.” The rest of the Rashae’s girlfriends laughed, piercing Alex with vengeful glares of disgust. It was never a good idea to get on Rashae Geller’s bad side. She wasn’t even sure if it was a good idea to be on her good side.
“Here.” Alex plopped down her own cup of pudding. “I didn’t want mine anyway.”
So, all I've done is established a personality of Rashae. But she doesn't play any further role in the story. In book two, however, she will have more page time.