Saturday’s Red Bulls match against the Chicago Fire at Red Bull Arena will be as much about a special, vibrant 10-year-old girl as it will be about the Red Bulls trying to continue their remarkable dominance on the home pitch.

If you’re at the arena for the 3:30 p.m. kickoff and you see a pretty little girl participating in the pregame coin toss with Dax McCarty, the former Red Bulls midfielder and current member of the Fire, that will be Julia de Grandpre.

Julia, the daughter of Red Bulls general manager Marc de Grandpre, is on the autism spectrum and is very much the inspiration, not only for the Autism Awareness Day the Red Bulls will conduct Saturday, but for the unique, forward-thinking “sensory room’’ the club has created at the arena. It’s a place where families with children on the autism spectrum can bring them for a quiet, calming experience while still watching the match.

The Red Bulls are the first MLS team to open a permanent “sensory’’ room and it was inspired by de Grandpre hearing about the NBA’s Cavaliers having opened one.

Julia de Grandpre is living proof that days like Saturday at Red Bull Arena are about not only wins and losses, but about experiences.

“My daughter was the inspiration behind it, but it’s really something the club thought would be a worthwhile initiative considering the lack of awareness for the developmental challenges that all these families are dealing with,’’ de Grandpre said of the Autism Awareness Day and the sensory room.

The room actually was made possible when de Grandpre gave up his office in Red Bull arena, where office space is sparse.

“If we can do this and help some families have some normalcy during a sporting event that they might not normally have, that’s what I’m really proud of what the club has done,’’ de Grandpre said.

As proud as the Red Bulls’ 3-0 home record this season in MLS play, their 37-7-10 home record in coach Jesse Marsch’s three-plus seasons and the 84-20-30 record since Red Bull Arena opened in 2010.

So Julia de Grandpre will be the center of attention for the coin toss — just as she was a year ago, before the Red Bulls played the Fire, who are led by her favorite player, McCarty, who was traded to Chicago before last season.

“It’s always very special to see Julia,’’ McCarty said by phone Friday before boarding the team plane from Chicago to New Jersey. “She’s a really special little girl in so many different ways, and definitely one of the hardest parts of the trade was knowing that I wasn’t going to be able to see her as much as I used to.

“No matter if I was having a great day or a bad day, she always brought a smile to my face. It always put me a great mood just seeing her smile. I’m really looking forward to seeing her again.’’

There’s a mutual bond and joy shared between Julia and the Red Bulls players, coaches and front office.

“Julia has become sort of an extension of the front office and the players and has grown attached to the team,’’ de Grandpre said. “This is her outlet. She can be herself and no one will judge her, no one will question her. They appreciate her for what she is and she loves it. She calls the players her friends.’’

One of her favorites is Red Bulls midfielder Connor Lade, the Morristown, N.J., native, who played his college ball at St. John’s. Lade called Julia “one of the most popular people in this organization.’’

“The amount of joy she brings to every single person in the organization is immeasurable,’’ Lade said. “She always has a smile on her face and has a very infectious personality. She’s an incredible person, a very brave girl, and we are so lucky to be able to have her as a part of our family.’’

Lade joked that Julia has told him he’s one of her “favorite’’ players, but, he said, “I don’t think I even hold a candle to what Dax meant to her.’’

As unhappy as Red Bulls fans were with McCarty’s departure, it was particularly distressing to Julia and a challenge for de Grandpre to explain to his daughter.

“That didn’t go over well at all,’’ he said. “She got very anxious and she had a tantrum. Even during games after we traded him, she kept asking, ‘Where is Dax? Why is Dax not here? Where is he? Is he sick? Is he hurt?’

“It was confusing to Julia. She couldn’t understand why players came and went. I had to explain, showed her the Chicago Fire logo and said, ‘Dax was on our team and now he’s going to play for the Fire.’ She didn’t understand why we traded him. I said, ‘It happens, Julia, and it’ll happen again. Dax is probably happy in Chicago and he probably misses you.’ ”

On Saturday afternoon they’ll be reunited again.

“She’ll do the coin toss with Dax and I’m sure she’s going to hug him,’’ de Grandpre said. “And then she’ll look at him and she’ll get all shy.’’